MMS3000 battery packs contain high capacity NiCad batteries which have a very long life of at least 1000 charge/discharge cycles. However they must be maintained properly to retain their performance.
This includes periodic discharging to reduce the NiCad's memory effect. The discharging should be done approximately monthly, and is VERY easy to do. When the unit next needs a recharge, plug in the charger, go to the battery management Charger Control screen and select "Recondition Battery". It will automatically recharge the battery afterwards.
If batteries are charged very frequently, without ever discharging, the battery charging algorithm can become confused about the battery condition, and continue charging a full battery. The battery then becomes warm. To prevent this, recondition the battery as above.
See the Battery Management section of your manual for more details.
