Designed for Lithium batteries with charging voltage of 8.4 v-9v and 10 A, it has Multiple protective functions including overcharge protection, over-discharge protection, overcurrent protection, and short circuit protection Balance function ensures each battery cell is fully charged at the same time Can be used to avoid explosion, fire, and damage of your battery pack, safe for use Help prolong the service time of your batteries.

Specifications:

Model: HX - 2S - JH20 overcharging range: 4.25-4.35 v plus
or minus 0.05 v
Size: 46.7 * 23 * 3.15mm over voltage range: 2.5-3.0 v plus
or minus 0.05 v
Maximum working current: 10 a working temperature: - 40 - + 50 °
Maximum instantaneous current: 20 a storage conditions: - 40 - + 80 °
Static current: less than 10uA effective life: more than 50,000 hours
Resistance: less than 300 m Ω short circuit protection: to protect
and restore must charge
Charging voltage: 8.4 v-9v
The protection board size and device description;
The protective plate size is 46.7 * 23 * 3.15mm

Pinout description:
· B + battery anode; 
· B - connect battery negative terminal;
· MMB connect battery 1 to battery 2; 
· P + charging/discharge correct poles (charging
end/discharge
end sharing);
· P - charging/discharge terminal negative terminal
(charging end/discharge end sharing)