The Handled POS Device battery is consists of 2pcs Lithium Polymer cell-103450. 
 
Battery specification
Battery pack:103450-2S1P 
Nominal voltage: 7.4V
Rated capacity: 1800mAh
Continuous discharge current : 0.2C (Standard),  1C (Max.)
Working temperature: Charge:      0~45℃
                     Discharge:   -20~ 60℃
Battery dimension :  MAX 12.2*55*71mm
Internal resistance: ≤200mΩ
PCBA:     IC-S8242AAX+MOS-FTD2017R
Overcharge current/ Series : 4.3±0.025V
Over discharge current:     2.8±0.05V
Over current protection   : 5~10A
Picture of Lithium Polymer Cell :3.7V 1800mAh  103450  

 

Lithium Polymer Battery Pack: 7.4V  103050-2S1P  1800mAh

 

Use precaution:

1.Charge method:(Constant Current /Constant Voltage)

 2.Only use the original charger 8.4V/1A Lithium polymer battery charger 

 3.Battery without memory function, you can recharge it anytime,no need to use it until power off.