Rehan Electronics Looky+, User Manual

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4 Maintenance
Only use accessories for the Looky+ that are approved of by the producer.
4.1 Battery maintenance

Remove the batteries from the Looky+ if you do not intend to use the device
for an extended period of time. This will improve the longevity of the batteries.

Batteries are sensitive to over-charging. It is recommended to only charge the
batteries when they are completely drained.

Chargeable NiMh batteries have an auto discharge that strongly depends on
the temperature of the environment (e.g. never leave your batteries in a car
that is parked in direct sunlight).
 New NiMh batteries must be charged several times before reaching their
nominal capacity.

Charge NiMh batteries at least once every 6 months.

The average lifespan of a rechargeable battery is usually 300 charging cycles,
but this depends on the use. Total capacity will slowly decrease after multiple
charging cycles.

Charge the batteries in a well ventilated environment.