Delivery to
goods.your_address
All
All
Appliances
Automotive
Bath
Building Materials
Cleaning
Doors & Windows
Electrical
Flooring
Furniture
Hardware
Health And Wellness
Heating, Venting & Cooling
Holiday Decorations
Home Decor
Industrial & Scientific
Kitchen
Lighting
Lumber & Composites
Musical Instruments
Other
Outdoors
Paint
Playground Sets
Plumbing
Safety Equipment
Smart Home
Sports & Outdoors
Storage & Organization
Tools
Window Treatments
Workwear
EN/
USD
Select the country/region, language, and currency you prefer for shopping.
Country Website
Language
Currency
Submit
Hello, Sign in
Account & Order
Categories
Deals
Deals by Categories
Shop All
Outdoors
Appliances
Automotive
Tools
Plumbing
Building Materials
Electrical
Heating, Venting & Cooling
Sports & Outdoors
More Ways to Save
Bulk Savings
Clearance
Best Sellers
Best Sellers by Categories
Shop All
Outdoors
Appliances
Automotive
Tools
Plumbing
Building Materials
Electrical
Heating, Venting & Cooling
Sports & Outdoors
New
New by Categories
Shop All
Outdoors
Appliances
Automotive
Tools
Plumbing
Building Materials
Electrical
Heating, Venting & Cooling
Sports & Outdoors
Inspiration & DIY
Inspiration
DIY Projects & Ideas
Member Club
Product Recall
Download VEVOR App
Get
$5.00
Off
$99.00
+ Orders on Your First 3 App Orders
Scan the QR code to download
Home
Tools
Power Tools
Jobsite
Search for "
portable refrigerator fan
"
Outdoors
Heating, Venting & Cooling
Tools
Appliances
46 Results
Sort by:
Popular
Popular
Price from Low to High
Price from High to Low
Hot
New
Categories
Outdoors
Compressor Car Refrigerator
Heating, Venting & Cooling
Inline Duct Fan
Tools
Non Clip Cordless Fan
Appliances
Open Air Curtain Merchandiser
Price
Go
Under
30
50
~
100
100
~
200
200
~
500
500
&
Above
Customer Rating
5 stars only
4 stars and up
3 stars and up
2 stars and up
1 star and up
Special Offers
On Sale
Bulk Savings
In Stock
Pickup
Summer Sale
Quick look
VEVOR Cordless Fan 16 in, Portable Quiet Personal Fan for Home or Office, 360 Degree Manual Pivoting Head, Stepless Speed Regulation High Velocity Cordless Fan, Heavy Duty Metal Industrial Floor Fans
(129)
86.9
86.9
Deal after registering
Member discounted price
0% cash back
at checkout.
86.9
Non-PRO Account
86.9
Save
Non-PRO Account
In Stock.
Add to Cart
Clearance
Quick look
VEVOR Portable Fan Rechargeable 9 inch, Battery Powered Fan with LED Lantern, 4 Speeds Adjustable & 45°/90°Automatic Swivel & Timer , USB Battery Operated Fans for Travel Bedroom Home Camping Office
(129)
58.9
58.9
Deal after registering
Member discounted price
0% cash back
at checkout.
58.9
Non-PRO Account
58.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
VEVOR Portable Refrigerator 37 Quart(35 Liter),12 Volt Refrigerator App Control(-4℉~68℉), Car Refrigerator Dual Zone with 12/24v DC & 110-240v AC for Camping, Travel, Fishing, Outdoor or Home Use
(687)
147.9
205.9
Deal after registering
Member discounted price
0% cash back
at checkout.
147.9
Non-PRO Account
147.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Cordless Fan 12 in, Portable Quiet Personal Fan for Home or Office, 360 Degree Manual Pivoting Head, Stepless Speed Regulation High Velocity Cordless Fan, Heavy Duty Metal Industrial Floor Fans
(129)
72.9
72.9
Deal after registering
Member discounted price
0% cash back
at checkout.
72.9
Non-PRO Account
72.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Portable Car Refrigerator, 12 Volt Car Refrigerator Fridge, 50 L / 52.8 QT Dual Zone Portable Freezer, -4℉-68℉ Adjustable Temperature, Compressor Cooler for Home, Outdoor, Camping, RV, Car
(91)
309.9
309.9
Deal after registering
Member discounted price
0% cash back
at checkout.
309.9
Non-PRO Account
309.9
Save
Non-PRO Account
Extra 10% off
with coupon
In Stock.
Add to Cart
Quick look
VEVOR Portable Car Refrigerator, 12 Volt Car Refrigerator Fridge, 58 L / 61.5 QT Dual Zone Portable Freezer, -4℉-68℉ Adjustable Temperature, Compressor Cooler for Home, Outdoor, Camping, RV, Car
(91)
354.9
354.9
Deal after registering
Member discounted price
0% cash back
at checkout.
354.9
Non-PRO Account
354.9
Save
Non-PRO Account
Extra 5% off
with coupon
In Stock.
Add to Cart
Deals
Quick look
VEVOR 12 Volt Refrigerator 10 Qt, Portable Mini Freezer (-4℉~68℉) with APP Control Car Compressor Fridge Cooler 12V/24V DC and 110-220V AC For Camping, Road Trip, Travel, Outdoor and Home
(687)
97.9
124.9
Deal after registering
Member discounted price
0% cash back
at checkout.
97.9
Non-PRO Account
97.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Desk Fan Bladeless, 12.99 Inch Portable Desk Fan, 6-Speed USB Quiet Cooling Small Tower Fan with Rechargeable Battery, Easy to Clean & Kids-Friendly, Blows Cold Air for Bedroom, Office, Home
(30)
25.99
25.99
Deal after registering
Member discounted price
0% cash back
at checkout.
25.99
Non-PRO Account
25.99
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
VEVOR 12 Volt Refrigerator, 58 Qt Car Refrigerator, Dual Zone Portable Freezer, Cooler Compressor Freezer with 12/24V DC and 110-240V AC, Freezer Fridge Cooler, for Car, Truck RV, Camping and Home Use
(687)
189.9
257.9
Deal after registering
Member discounted price
0% cash back
at checkout.
189.9
Non-PRO Account
189.9
Save
Non-PRO Account
Extra 10% off
with coupon
In Stock.
Add to Cart
Quick look
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 70 L Single Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping, RV
(97)
289.9
289.9
Deal after registering
Member discounted price
0% cash back
at checkout.
289.9
Non-PRO Account
289.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan, 8-Inch 807 CFM with Temperature Humidity Controller, Quiet EC-motor Ventilation Exhaust Fan for Cooling Booster, Grow Tents, Hydroponics
(202)
89.9
89.9
Deal after registering
Member discounted price
0% cash back
at checkout.
89.9
Non-PRO Account
89.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Portable Ventilator, 10" Heavy Duty Cylinder Fan, 350W Strong Shop Exhaust Fan 1942CFM, 9.8ft Power Cord (No charging head), Industrial Utility Blower for Sucking Dust, Smoke Home/Workplace
(78)
186.9
186.9
Deal after registering
Member discounted price
0% cash back
at checkout.
186.9
Non-PRO Account
186.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 32 L Dual Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping, RV
(97)
179.9
245.9
Deal after registering
Member discounted price
0% cash back
at checkout.
179.9
Non-PRO Account
179.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 15 L Single Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping, RV
(97)
169.9
169.9
Deal after registering
Member discounted price
0% cash back
at checkout.
169.9
Non-PRO Account
169.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Portable Ventilator, 10 inch Heavy Duty Cylinder Fan with 16.4ft Duct Hose, 380W Strong Shop Exhaust Blower 1893FM, Industrial Utility Blower for Sucking Dust, Smoke, Smoke Home/Workplace
(236)
121.9
121.9
Deal after registering
Member discounted price
0% cash back
at checkout.
121.9
Non-PRO Account
121.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 115 L Dual Zone Portable Freezer with Wheels and Handle, -4℉-68℉, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping
(91)
709.9
709.9
Deal after registering
Member discounted price
0% cash back
at checkout.
709.9
Non-PRO Account
709.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, DC 12/24V AC100-240V Compressor Electric Cooler, -4°F to 68°F Car Fridge with APP Control, 21 QT Cars Freezer for RVs, Campsites, Boats, Camping, Fishing, 60W Portable Freezer
(687)
113.9
154.9
Deal after registering
Member discounted price
0% cash back
at checkout.
113.9
Non-PRO Account
113.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Portable Ventilator, 12 inch Heavy Duty Cylinder Fan with 16.4ft Duct Hose, 585W Strong Shop Exhaust Blower 3198CFM, Industrial Utility Blower for Sucking Dust, Smoke, Smoke Home/Workplace
(236)
129.9
129.9
Deal after registering
Member discounted price
0% cash back
at checkout.
129.9
Non-PRO Account
129.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR 12 Volt Refrigerator, 48 Quart (45L) Fast Cooling Portable Freezer with App Control (-4℉~68℉), Car Fridge with 12/24v DC & 110-240v AC for Travel, Truck, Camping and Home Use, Black
(687)
229.9
229.9
Deal after registering
Member discounted price
0% cash back
at checkout.
229.9
Non-PRO Account
229.9
Save
Non-PRO Account
Extra 10% off
with coupon
In Stock.
Add to Cart
New
VEVOR 12 Volt Refrigerator, 21.1 QT/ 20L Car Fridge, Portable Ultra-Light EPP Freezer, APP Control Electric Compressor, 12V/24V DC, 14℉ to 50℉, for Truck Van RV SUV Boat Travel Camping
(97)
165.9
165.9
Deal after registering
Member discounted price
0% cash back
at checkout.
165.9
Non-PRO Account
165.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 25 L Dual Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping, RV
(97)
169.9
213.9
Deal after registering
Member discounted price
0% cash back
at checkout.
169.9
Non-PRO Account
169.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 9 L Single Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping, RV
(97)
96.9
126.9
Deal after registering
Member discounted price
0% cash back
at checkout.
96.9
Non-PRO Account
96.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan, 6-Inch 402 CFM with Temperature Humidity Controller, Quiet EC-motor Ventilation Exhaust Fan for Cooling Booster, Grow Tents, Hydroponics
(202)
82.9
82.9
Deal after registering
Member discounted price
0% cash back
at checkout.
82.9
Non-PRO Account
82.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
VEVOR Car Refrigerator, 12 Volt Car Refrigerator Fridge, 40 L Dual Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping, RV
(97)
202.9
279.9
Deal after registering
Member discounted price
0% cash back
at checkout.
202.9
Non-PRO Account
202.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
VEVOR 12 Volt Refrigerator, 42.3 QT/ 40L Car Fridge, Portable Ultra-Light EPP Freezer, APP Control Electric Compressor, 12V/24V DC, 14℉ to 50℉, for Truck Van RV SUV Boat Travel Camping
(97)
199.99
199.99
Deal after registering
Member discounted price
0% cash back
at checkout.
199.99
Non-PRO Account
199.99
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 12 Volt Car Refrigerator, 31.7QT/30L Car Fridge, Portable Electric Cooler with -4℉~68℉ Adjustable Temperature, 12/24V DC and 100- 240V AC Compressor Freezer for Outdoor, Camping, Travel, RV
(97)
195.9
195.9
Deal after registering
Member discounted price
0% cash back
at checkout.
195.9
Non-PRO Account
195.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, DC 12/24V AC100-240V Compressor Electric Cooler, -4°F to 68°F Car Fridge with APP Control, 16 QT Cars Freezer for RVs, Campsites, Boats, Camping, Fishing, 60W Portable Freezer
(687)
133.11
147.9
Deal after registering
Member discounted price
0% cash back
at checkout.
133.11
Non-PRO Account
133.11
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR 12 Volt Refrigerator, 21.1 QT/ 20L Car Fridge for Tesla Model 3, Portable Electric Freezer Compressor with APP Control, 12V/24V DC, 3℉ to 50℉
(9)
259.9
259.9
Deal after registering
Member discounted price
0% cash back
at checkout.
259.9
Non-PRO Account
259.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Car Refrigerator, DC 12/24V AC100-240V Compressor Electric Cooler, -4°F to 68°F Car Fridge with APP Control, 23 QT Cars Freezer for RVs, Campsites, Boats, Camping, Fishing, 45W Portable Freezer
(687)
172.9
172.9
Deal after registering
Member discounted price
0% cash back
at checkout.
172.9
Non-PRO Account
172.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR 12 Volt Refrigerator, 19 QT/ 18L Car Fridge, Portable Electric Freezer Compressor with Handle, 12V/24V DC 100-240V AC, -4℉ to 68℉/ -20℃ to 20℃, for Truck Van RV SUV Boat Travel Camping
(97)
164.9
164.9
Deal after registering
Member discounted price
0% cash back
at checkout.
164.9
Non-PRO Account
164.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 12 Volt Car Refrigerator, 42.3QT/40L Car Fridge, Portable Electric Cooler with -4℉~68℉ Adjustable Temperature, 12/24V DC and 100- 240V AC Compressor Freezer for Outdoor, Camping, Travel, RV
(97)
213.9
213.9
Deal after registering
Member discounted price
0% cash back
at checkout.
213.9
Non-PRO Account
213.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR 12 Volt Refrigerator, 12.68 QT/ 12L Car Fridge, Portable Electric Freezer Compressor with Handle, 12V/24V DC 100-240V AC, -4°F to 68℉/-20℃ to 20℃, for Truck Van RV SUV Boat Travel Camping
(97)
150.9
150.9
Deal after registering
Member discounted price
0% cash back
at checkout.
150.9
Non-PRO Account
150.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR 12 Volt Car Refrigerator, 52.8QT/50L Car Fridge, Portable Electric Cooler with -4℉~68℉ Adjustable Temperature, 12/24V DC and 100- 240V AC Compressor Freezer for Outdoor, Camping, Travel, RV
(97)
176.9
239.9
Deal after registering
Member discounted price
0% cash back
at checkout.
176.9
Non-PRO Account
176.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Portable Ventilator, 10 inch Heavy Duty Cylinder Fan with 33ft Duct Hose, 380W Strong Shop Exhaust Blower 1893FM, Industrial Utility Blower for Sucking Dust, Smoke, Smoke Home/Workplace
(236)
145.9
145.9
Deal after registering
Member discounted price
0% cash back
at checkout.
145.9
Non-PRO Account
145.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR 12 Volt Car Refrigerator, 26.4QT/25L Car Fridge, Portable Electric Cooler with -4℉~68℉ Adjustable Temperature, 12/24V DC and 100- 240V AC Compressor Freezer for Outdoor, Camping, Travel, RV
(97)
135.9
187.9
Deal after registering
Member discounted price
0% cash back
at checkout.
135.9
Non-PRO Account
135.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, 12 Volt Car Armrest Refrigerator Fridge, 15 L Single Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping
(97)
171.7
245.9
Deal after registering
Member discounted price
0% cash back
at checkout.
171.7
Non-PRO Account
171.7
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR Car Refrigerator, 12 Volt Car Armrest Refrigerator Fridge, 8 L Single Zone Portable Freezer, -4℉-68℉ Adjustable Range, 12/24V DC and 100-240V AC Compressor Cooler for Outdoor, Camping
(97)
159.9
215.9
Deal after registering
Member discounted price
0% cash back
at checkout.
159.9
Non-PRO Account
159.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Mini Fridge, 20L Skincare Fridges with Temper Control Touch Screen, Portable Small Beverage Refrigerator for Bedroom Office Car Dorm, AC/DC Cool Warmer for Cosmetic Drink Milk, White
(81)
111.99
111.99
Deal after registering
Member discounted price
0% cash back
at checkout.
111.99
Non-PRO Account
111.99
Save
Non-PRO Account
Only 1 Left, order soon
Add to Cart
New
Quick look
VEVOR 12 Volt Refrigerator, 13.7 QT/ 13L Car Fridge, Portable Electric Freezer Compressor, 12V/24V DC, 21℉ to 50℉/ -6℃ to 10℃, for Truck Van RV SUV Boat Travel Camping Road Trips
(97)
264.9
264.9
Deal after registering
Member discounted price
0% cash back
at checkout.
264.9
Non-PRO Account
264.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan, 4-Inch 205 CFM Quiet EC-motor Ventilation Exhaust Fan, with Temperature Humidity Controller for Cooling Booster, Grow Tents, Hydroponics
(202)
71.9
71.9
Deal after registering
Member discounted price
0% cash back
at checkout.
71.9
Non-PRO Account
71.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Open Air Merchandiser, 3-Tier Shelving Commercial Refrigerator, Grab and Go Display Cooler Refrigerator with Air Curtain, 4 Swivel Wheels, LED Light, for Restaurants, Stores, Office, 7.8cu.ft.
(29)
1699.9
1699.9
Deal after registering
Member discounted price
0% cash back
at checkout.
1699.9
Non-PRO Account
1699.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Open Air Merchandiser, 2-Tier Shelving Commercial Refrigerator, Grab and Go Display Cooler Refrigerator with Air Curtain, LED Advertising Light, Fits for Restaurants, Stores, Office, 12.7cu.ft.
(29)
2799.9
2799.9
Deal after registering
Member discounted price
0% cash back
at checkout.
2799.9
Non-PRO Account
2799.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 12 Volt Refrigerator, 82.4 QT/ 78L Car Fridge, Portable Electric Freezer Compressor with Handle, APP Control and Wheel, 12V/24V DC 100-240V AC, -4℉ to 68℉, for Truck Van RV SUV Travel Camping
(91)
298.9
269.99
Deal after registering
Member discounted price
0% cash back
at checkout.
298.9
Non-PRO Account
298.9
Save
Non-PRO Account
Out of Stock
Notify Me
Registered
Quick look
VEVOR 12 Volt Car Refrigerator, 63.4QT/60L Car Fridge, Portable Electric Cooler with Wheels and Handle, -4℉~68℉, 12/24V DC and 100- 240V AC Compressor Freezer for Outdoor, Camping, Travel, RV
(91)
279.9
229.99
Deal after registering
Member discounted price
0% cash back
at checkout.
279.9
Non-PRO Account
279.9
Save
Non-PRO Account
Out of Stock
Notify Me
Registered
Quick look
VEVOR 12 Volt Refrigerator, 37 QT/ 35L Car Fridge for Tesla Model Y, Portable Electric Freezer Compressor with APP Control, 12V/24V DC, -8℉ to 50℉
(9)
289.9
222.99
Deal after registering
Member discounted price
0% cash back
at checkout.
289.9
Non-PRO Account
289.9
Save
Non-PRO Account
Out of Stock
Notify Me
Registered
Quick look
VEVOR Portable Ventilator, 10 inch Heavy Duty Cylinder Fan with 33ft Duct Hose, 350W Strong Shop Exhaust Blower 1948CFM, Industrial Utility Blower for Sucking Dust, Smoke, Smoke Home/Workplace
(77)
149.9
143.99
Deal after registering
Member discounted price
0% cash back
at checkout.
149.9
Non-PRO Account
149.9
Save
Non-PRO Account
Out of Stock
Notify Me
Registered
Related searches
are you freezer
car freezer
western deep freezer glass top price
deep freezer top glass
glass top deep freezer price
just freezer
glass top display freezer
best car refrigerator freezer
little freezer
freezers
freezer for car
car with freezer
Freezer
freezer that goes to
freezer for
See more
VEVOR 12 Volt Refrigerator, 58 Qt Car Refrigerator, Dual Zone Portable Freezer, Cooler Compressor Freezer with 12/24V DC and 110-240V AC, Freezer Fridge Cooler, for Car, Truck RV, Camping and Home Use
(687)
189.9
0% cash back
at checkout.
189.9
189.9
257.9
PRO Savings:
In Stock.
Add to Cart
1
You May Also Like
Today's Deals For You
Recently Viewed
Tips & Inspiration
Recommended Searches
portable freezer for home
tents for cars tents
12-volt portable refrigerator
calory car refrigerator
lumore portable refrigerator or freezer
-diffusers-waterless-home
homes
-the-air-compressor airgun
-diffusers-scent-home
-diffuser-diffusers-home
refrigerator compressor dl19h2102035289
skincare refrigerator for bathroom
dual portable refrigerator freezer
velivi 24 beverage fridge under counter
medical travel refrigerator
turn freezer into fridge
5 gallon water dispenser pump for refrigerator
skin care plug in fridge
ac for for outside
car refrigerator with rechargeable battery