Li-ion battery tips

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most cameras these days are equipped with Li-Ion batteries. here are
some battery handling tips that i've learnt over time:

- Li-ion batteries do not like to be deep-discharged. whenever
possible, only discharge battery down to about 40%;

- Li-ion batteries have a finite life, regardless of whether they are
in use or lie on the shelf. so buy your batteries fresh from reliable
supplier. check manufacture date. expect 50% (this is a very
pessimistic rule of thumb, and it varies, of course) depletion over 1
year of shelf life;

- Li-ion batteries dont like warm. battery can lose nearly all of its
capacity if left in a hot car for an extended period of time. plus, it
can explode or ignite. quite literally. so keep batteries from heat
sources and direct sunlight;

- the opposite is true, Li-ion battaries like cool. if you need to
store unused battery for a while, put it in refrigirator; but DO NOT
freeze; charge Li-ion battery to 40% for storage;

- there is some evidence to suggest that it is safe to freeze Li-ion
batteries if they're brought to room temperature BEFORE USE;

- Li-ion batteries like to be charged early and often. thats why they
usually come from the manufacturer fully charged (they self-discharge
at only 5% per month).

- Li-ion battery really dislike being deeply discharged. some can stop
functioning if overdischarged (because internal cirquitry will stop
functioning and prevent re-charging, although most will recover after a
long, 12hour+ charging session);

whatever you do, follow manufacturer recommendations and use common
sense. be safe.