2pcs Listman IMR 21700 4200mAh 25A Flat Top Li-ion Rechargeable Battery.

Brand: Listman
Unit: 2pcs/pack
Model: 21700
Normal Voltage: 3.7V
Normal Capacity: 4200mah
Type: LiMn (IMR)
Discharge Current: 25A
Package: Simple Packing

Warnings:

-Do not overdischarge/overcharge
-Recharge drained batteries ASAP
-Do not short circuit
-Do not dispose of in fire
-Do not expose to extreme heat or water
-Please be familiar with handling lithium batteries before purchase.