Midland Radio SP-410 - Manual (Page 29)

SP-400 Series User’s Guide
Memory effect
The NiMH (Nickel Metal Hydride) battery pack is made with a
more advanced technology than a NiCd (Nickel Cadmium)
battery. For this reason it is virtually free of what is called
“memory effect”, which affects NiCd batteries. Memory effect
causes a reduction in the battery’s capacity. However memory
effect may occur if you regularly charge the battery when you
haven’t discharged it at least at 50-70%. Memory effect can be
easily avoided by following these simple rules:

When possible, charge battery packs only when they are
completely discharged.

Do not remove the battery from the charger before the
necessary time to provide a full charge.

Provide at least two deep charge/discharge cycles per
month.

The best way to avoid memory effect is to use two
battery packs and alternate their use with the radio. This
will allow you to keep your transceiver in operation by
replacing the battery pack when it is fully discharged.
Erasing memory effect
To erase memory effects try applying 3-4 deep charge/discharge
cycles as follows:
1. Attach the battery to the radio and leave the radio on until
the battery runs down and the radio turns off.
2. Switch off the radio and wait at least one hour and then turn
the radio back on. Note that some energy remains in the
battery, if the radio turns on.
3. Leave the radio on until the battery runs down again.
4. Repeat steps 2 and 3 up to three times or until the battery is
well drained.
© 2005, Midland Radio Corporation
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