This module is capable of handling 3 18650 batteries or lithium-polymer(LiPo) batteries. It could power-up geared motors rated at 12V. It has a rated voltage of 10.8V using LiPo batteries, and 11.1V using 18650 or 3.7V rated lithium batteries. The instantaneous current is peaked at 15A to 20A, with 10A normal current discharge.

It has an internal resistance of less 150mΩ for short circuit protection. In times of idling, it only discharges 5µA and can live up to 30000 hours, that's almost a year! It could be stored or used in places with temperatures from 40°C to 50°C.

There are 6 solder pads that you could connect to, two of which are for charging/discharging (+/-). 4 pads are for the battery (B1, B2, B+, B-). B1 connects to the middle part of the first series, in between the connected positive pole and negative pole of the battery. B2 connects to the second series. B+ connects to the positive pole ending of the battery series, and B- connects to the available negative pole ending of the battery series.

Description:

• 3S, (3 x 18650 batteries or lithium-polymer batteries in series)
• 10.8V (polymer battery rated voltage)
• 11.1V (18650 or 3.7V lithium battery rated voltage)
• 12.6V (lithium-ion battery a full charge voltage)
• Discharge 20A (refers to the maximum discharge current limiting) 

QUICK SPECS:

• Model: HX-3S-D021 voltage range: 4.25-4.35v ± 0.05v
• Size: 51 x 23 x 4.0mm voltage: 2.3-3.0V ± 0.05v
• Maximum current: 10A working temperature: -40---+50 c
• The maximum instantaneous current: 15-20A storage conditions: -40--+ 80 ℃
• Quiescent current: less than 50uA active life: more than 30,000 hours
• Internal resistance: less than 150m short circuit protection: protection delayed self-recovery.
• The protection plate size and device description;
• The protection plate size is 51 x 23 x 4mm; components for the Seiko S-8254AA protection IC and authentic AOS