Replacement Battery for Makita Power Tool 12V 2000mAh 1220 1222 PA12 (EY-MAK-12_A_2000_NI-CD)

Compatible original Part NO.:

1220

1222

192598-2

192681-5

193981-6

638347-8

638347-8-2

How to Charge the Li-ion 1220 battery?

Claims of fast charging a Li-ion Makita 1220 Power Tool Battery in one hour or less usually results in lower charge levels. Such a charger simply eliminates stage two and goes directly into 'ready' once the voltage threshold is reached at the end of stage one. The charge level at this point is about 70%. The topping charge typically takes twice as long as the initial charge.

Depending on the charger and the self discharge of the Makita 1220 battery, a topping charge may be implemented once every 500 hours or 20 days. Typically, the charge kicks in when the open terminal voltage drops to 4.05 volts per cell and turns off when it reaches 4.20V/cell.

No trickle charge is applied because the Li-ion Power Tool batteries for Makita 1220 Power Tool is unable to absorb overcharge. Trickle charge could cause plating of metallic lithium, a condition that makes the cell unstable. Instead, a brief topping charge is applied to compensate for the small amount of self-discharge the Makita 1220 battery and its protective circuit consume.