Battery replacement by NI is feasible. I just sent my Adam to them so that they can change battery.
Cost? 30$ for the battery + 13$ work + shipping cost to the service center (20$n for me, I am based in Europe)
The three cells used are Sanyo 18650 (Korean regulation R1112). The specifications are:
Part number: UR18650A
Nominal Capacity: 2150mAh (0.43A discharge)
Nominal Voltage: 3.60V (0.43A discharge)
End Voltage: 3.0V
Charging Current (Std.): 1.505A (0~+40C)
Charging Voltage: 4.20V (+/- 0.03V)
Charging Time (Std.): 3 hours
Discharging Current (Std.): 1.075A (-20~60C)
Discharging Current (Max): 2.15A (-20~60C), 4.30A (0~40C)
Internal Resistance: <100mOhms (AC impedance 1kHz)
End tab diameter: 9mm
Maximum discharge current as a single cell is as above. However after assembling to a battery pack there is the limitation of maximum discharge current because of protection circuit and protection device.
Charge current must be below 2.50A per cell. Charging voltage must be 4.20V. In case of a battery voltage below 3.0V it should be charged with pre-charge current below 0.1A. When the voltage exceeds 3.0V the standard charging rates can be used. Do not constant (trickle) charge. Do not over-discharge below 2.0V per cell. Do not charge outside temperature range 0~40C.
Last edited by IntuitiveNipple; 05-17-2012 at 11:48 PM.
Last edited by IntuitiveNipple; 05-17-2012 at 11:49 PM.