Seller was paid for 4 batteries, but I only got 3 working batteries. How can I reach their customer service?

Well. I got 2 but none of them works. Please let me know if you find out. Amazon should get rid of this seller.

How long does the charge hold while not in use?

Lithium-Ion has a very high retention at mid-charge. Generally it loses around 5-10% charge in the first 72 hours until it hits 90%, then around 2-3% per month. Once it drops under 20%, it will begin to die out rapidly within around 2 weeks.

Are these batteries supposed to reach temps of over 140+ degrees when charging? I'm afraid they're going to catch fire.

No, that is too hot. About 120 is as hot as they should get. You should be protected against a fire like the seller pointed out although it’s not a safety valve it’s a fuse that will break but can’t be reset. But if the battery is getting that hot in the first place it make me question the quality and worry that the fuse won’t work. The seller is completely wrong about it being impossible for the battery to catch fire, it’s rare but definitely possible. Also fire aside getting that hot is going to severely shorten the battery’s lifespan.

What is the weight in grams of a single aaa battery?

Not sure but light them 1.2v recharge and regular 1.5v battery

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USB C Lithium ion Rechargeable Battery, High Capacity 1.5V 5000mWh Rechargeable C Battery, 2.5 H Fast Charge, 1200 Cycle with Type C Port Cable, Constant Output,2-Pack

USB C Lithium ion Rechargeable Battery, High Capacity 1.5V 5000mWh Rechargeable C Battery, 2.5 H Fast Charge, 1200 Cycle with Type C Port Cable, Constant Output,2-Pack

Product ID: 506287039

Details

Battery capacity
5000 Hour
Battery cell composition
Lithium Ion
Brand
Lankoo
Number of batteries
2 C batteries
Recommended uses for product
Bicycle Camera

⚡2.5H Fast USB-C Charging

🔄1200 Recharge Cycles Durable

🔋5000mWh High Capacity

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€ 49.96

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Power up smarter, faster, greener — never run out or fall behind!

POWER THAT LASTS - 5000mWh capacity fuels your devices longer, so you stay unplugged and unstoppable.
FAST FUTURE READY - USB-C charging means a quick 2.5-hour recharge—perfect for your fast-paced lifestyle.
SMART CHARGING STATUS - Built-in LED indicators keep you in the know—red blinking while charging, steady when full.
ECO CHIC RECHARGEABILITY - Over 1200 recharge cycles reduce waste and save you money—because sustainability is the new luxury.
CERTIFIED SAFE RELIABLE - CE, FCC, and RoHS certifications ensure your devices and you stay protected.

This 2-pack of 1.5V lithium-ion rechargeable C batteries delivers a robust 5000mWh capacity with a constant output, recharging fully in just 2.5 hours via USB-C. Designed for over 1200 recharge cycles, these batteries combine eco-friendly savings with certified safety standards (CE, FCC, RoHS), making them ideal for a wide range of household electronics.

Specifications

ASIN	B08C7RXWJ9
Amperage	1.5 Amps
Antenna Location	Bicycle, Camera, Clock, Laptop, Phone, Radio
Battery Capacity	5000 Milliampere Hour (mAh)
Battery Cell Type	Lithium Ion
Best Sellers Rank	22,434 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 539 in Rechargeable Household Batteries
Brand Name	Lankoo
Customer Reviews	3.8 3.8 out of 5 stars (7)
Item Weight	0.11 Kilograms
Manufacturer	LANKOO
Model Number	C
Number of Batteries	2 C batteries required. (included)
Reusability	Rechargeable
UPC	604697242387
Voltage	1.5 Volts

Reviews

J**A

Great service

All excellent! Thank you

10.03.2026

D**D

Aye, it's alright

Weird pluging into the side of the battery hut its a good idea.

8.12.2022

C**Y

Poorly made potential fire risk, one of four didn't work, returned

Very poor design. The USB C socket feels very difficult to mate properly. One of four purchased didn't flash at all, I would not rely on this and even go as far as saying given the poor connector design they may be a fire risk. I have returned to Amazon.

23.10.2022

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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