1/2/4 SLOT LI-ION BATTERY DIGITAL DISPLAY AC CHARGER FOR 18650/26650/16340/145001. Automatic recognition and conversion can charge various 3.6V lithium-ion batteries.
2. The maximum detection of current and voltage, self-stop when full, to protect the battery.
3. The LCD screen percentage shows the charging progress during charging, and can be plugged in for a long time.
4. Comprehensive protection function, the battery is installed in reverse, short circuit is not charged, and it is absolutely impossible to charge ordinary batteries.
5. Support all 5V charging heads on the market.Product parameters:
1. Size: 145x100x30mm.
2. No-load voltage: 5V +/- 0.2V.
3. Constant current charging current: 0.5A range 500 +/- 50mA.
4. Charging cut-off voltage: 4.20 +/- 0.05V.
5. Charging cut-off current: 0.5 level is less than or equal to 70mA.
6. Trickle charge current: 0.5A range 60 +/- 20mA.
7. External power supply standby current: less than or equal to 60mA.
8. Automatic recharge interval voltage: 3.9 +/- 0.15V.
9. Working environment temperature: 0-40 degrees celsius

3800mAh Lithium-Ion Battery Pack 3.7V - 4pcs battery

Generic  3800mAh Lithium Ion Battery Pack  3.7V With 
-rechargeable Li-ion battery 
Durable and long lifespan Capacity: 3800mah Voltage: 3.7V .replacement battery for fans. Torch. Power banksprotected rechargeable li-ion lithium battery.Suitable for laser pointer, flashlight torch ,Power bank .recharge fans,and other related 18650 electronics products.Super professional and so practical.Safe and environmental friendly.Model: 18650