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Old 10-22-2010, 11:51 PM   #10
SameerH
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Join Date: May 2010
Location: Toronto
Device: Kobo Aura H2O
I'm not an electrical engineer, but let's see if I can help shed some light.

We use a lithium-ion polymer battery, which boasts a better degradation rate than Lithium-ion.

The numbers we received on the battery:

Testing shows 80% retentive capacity remaining after 300 charge cycles (charging it from 2.75V to 4.2V). That's about 5 years @ 1 cycle per week.

Slap some conservatism on there (say 60%) and you're left with 3 years to get down to 80% retentive capacity.
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