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 AA Lithium ion Rechargeable Battery, High Capacity 1.5V 2600mWh Rechargeable AA Battery, 1.5 H Fast Charge, 1200 Cycle with Type C Port Cable, Constant Output,4-Pack

USB AA Lithium ion Rechargeable Battery, High Capacity 1.5V 2600mWh Rechargeable AA Battery, 1.5 H Fast Charge, 1200 Cycle with Type C Port Cable, Constant Output,4-Pack

Product ID: 525871748

Details

Number of batteries
4 AA batteries
Brand
Lankoo
Battery cell composition
Lithium Ion
Battery capacity
2600 Milliamp
Recommended uses for product
Bicycle Laptop

⚡2600mWh high capacity

🔄1200 recharge cycles

🔌1.5H fast Type-C charging

Description

🔋 Recharge smarter, live greener—never run out when it counts!

POWER THAT LASTS - 2600mWh capacity fuels your devices longer—no more mid-task battery panic.
FAST FUTURE READY - Type-C USB charging means a full battery in just 1.5 hours—stay powered without the wait.
ECO WALLET FRIENDLY - Over 1200 recharge cycles save you money and reduce waste—join the sustainable tech movement.
SMART CHARGING STATUS - LED indicators keep you in the know—red blinking while charging, steady light when ready.
CERTIFIED SAFE RELIABLE - CE, FCC, and RoHS certifications ensure your devices and you stay protected.

This 4-pack of USB rechargeable AA lithium-ion batteries delivers a robust 2600mWh capacity with a rapid 1.5-hour Type-C charge time. Designed for over 1200 recharge cycles, these batteries combine eco-conscious savings with consistent power output. LED indicators provide real-time charging status, while CE, FCC, and RoHS certifications guarantee safety and reliability across your essential devices.

Specifications

ASIN	B08C7SQTMW
Amperage	1.5 Amps
Antenna Location	Bicycle, Laptop, Phone
Battery Capacity	2600 Milliamp Hours
Battery Cell Type	Lithium Ion
Battery capacity	2600 Milliamp Hours
Battery cell composition	Lithium Ion
Best Sellers Rank	#102,388 in Electronics ( See Top 100 in Electronics ) #721 in Rechargeable Household Batteries
Brand	Lankoo
Compatible Phone Models	cordless phone
Customer Reviews	5.0 out of 5 stars 1 Review
Manufacturer	LANKOO
Model Number	AA
Number of Batteries	4 AA batteries required. (included)
Number of batteries	4 AA batteries required. (included)
Recommended uses for product	Bicycle, Laptop, Phone
Reusability	Rechargeable
UPC	604697209595 782912294295
Unit Count	1 Count
Unit count	1 Count
Voltage	1.5 Volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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