18650 battery charging module 2S

Model: AA438.
Features
Designed for multi-cell rechargeable li-ion / li-polymer batteries.
Great for making your own battery packs.
MOS and microcontroller based power regulation.
Individual, multi-channel cell charge/discharge cut-off controls.

Description
Over charge protection: 4.29V/4.05V, accuracy ≤±0.025V 1S
Over discharge protection: 3V/3.2V, accuracy ≤±0.1V 128MS
Over current protection: 200MV/9.8A, accuracy ≤±30MV/≤±3A 12MS
Short circuit protection: ≤50US
Internal resistance: ≤ 21MΩ
Operating temperature: -40 ~ +85 C
Storage temperature: -40 ~ +125 C