How long should a Lithium Ion Battery last?

Oyeve

Lifer
Oct 18, 1999
22,024
868
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I know its not a computer HW question but it is hardware :) Anyway, I have a Mintek MDP-1750 7" portable DVD player that, contrary to its really horrible reviews, I never had a problem with it. I have had it for 1 1/2 year and never had a problem with it. I use it everyday for a few hours and it is always plugged in. I recently took it out with the battery and got only 10 mins of life out of it. It fully charges (light goes out) but only lasts 10 minutes or so. What is the average lifespan on a LiIon battery? I thought it would be longer than 1 and a half years, especially if I barely use it in battery mode. the battery is always connected tho. Could that kill it faster if I use the unit on AC power and still have the battery connected?
 

Vegito

Diamond Member
Oct 16, 1999
8,329
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Its about one year, depending on how you use it. look at apples, the stuff lasted 8-10 months before dying.

Avg is 300-500 charges/discharges which is about 1-1.5 year if used daily.

I think for storage, you're suppose to leave it 40% charged and recharge at least once a month.. I heard leaving it on ac will kill it but thats only from word of mouth