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MW904 standard charger, otherwise you risk overcharging the batte-
ries.
If you use the batteries properly, you will obtain at least 400 cycles
of charge/discharge at maximum duty. It is normal for battery duty to
gradually decrease after about 2/3 of the battery’s life.
Rechargeable battery packs lose their charge over time even if
they are not used (auto-discharge); this is normal. A NiMH (Nickel
Metal Hydrate) battery may lose 10 – 20% of its energy within a few
days.
4.5.a Memory effect
Rechargeable NiMH (Nickel-Metal-Hydrate) batteries are virtually unaf-
fected by the “memory effect”. This phenomenon is associated with a
drastic reduction of battery autonomy and is triggered if the batteries
are regularly charged before having lost at least 50-75% of their power
and/or are not completely recharged. To avoid the memory effect:
• When possible, recharge the batteries only when they are comple-
tely discharged; i.e. when the battery indicator will be flashing.
• Do not disconnect the battery charger before the time indicated for
complete battery charging.
• Discharge and recharge your batteries completely at least twice a
month.
In any case, the best solution for avoiding the memory effect is to use
in turn two battery sets: one in use, and the other being charged as
spare set.
The memory effect can be easily eliminated by completely charging/
discharging the batteries 3 or 4 times.
The memory effect should not be confused with the normal
battery life, which is 400 cycles of charge/discharge on average.
It is completely normal for operating duty to decrease when the
batteries have reached the end of their life; at this point, you will
need to substitute the battery set.
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