Is it bad to run my iPod touch battery down everyday?

[alm99]

Everyday its down to less than 20% battery before I charge it at night. Is this bad?

 

[LtPage1]

Actually, lithium-ion batteries tend to hold their charges longer over time if you run them down all the way before recharging, IIRC.

 

[Stiganator]

I believe they figured that out. Whatever fraction you discharge is the fraction that is subtracted from the "estimated life". i.e. discharge it a quarter and recharge and you don't loose a whole cycle, just a quarter

 

[timswim78]

Originally posted by: LtPage1
Actually, lithium-ion batteries tend to hold their charges longer over time if you run them down all the way before recharging, IIRC.

You are thinking of NiCad and NiMH batteries. You should keep Lithium Ion batteries topped off as much as possible. Each deep cycle to a Lithium Ion battery reduces its long-term storage ability.

 

[dnuggett]

Originally posted by: timswim78

Originally posted by: LtPage1
Actually, lithium-ion batteries tend to hold their charges longer over time if you run them down all the way before recharging, IIRC.

You are thinking of NiCad and NiMH batteries. You should keep Lithium Ion batteries topped off as much as possible. Each deep cycle to a Lithium Ion battery reduces its long-term storage ability.

Linkage for this study?

 

[DnetMHZ]

Stolen from wikipedia:

Guidelines for prolonging Li-ion battery life

* Unlike Ni-Cd batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40% - 60%. Lithium-ion batteries should not be frequently fully discharged and recharged ("deep-cycled") like Ni-Cd batteries, but this is necessary after about every 30th recharge to recalibrate any external electronic "fuel gauge" (e.g. State Of Charge meter). This prevents the fuel gauge from showing an incorrect battery charge.[14]

 

[timswim78]

Originally posted by: dnuggett

Originally posted by: timswim78

Originally posted by: LtPage1
Actually, lithium-ion batteries tend to hold their charges longer over time if you run them down all the way before recharging, IIRC.

You are thinking of NiCad and NiMH batteries. You should keep Lithium Ion batteries topped off as much as possible. Each deep cycle to a Lithium Ion battery reduces its long-term storage ability.

Linkage for this study?

http://www.batteryuniversity.com/parttwo-34.htm
A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.