Warning – what you are about to read is from the “king of rechargeable battery killers”, so take it with a few metric tons of salt!
I have recently been told that, for newer-technology batteries:
1 – you do not want to overcharge them – a sure killer
2 – charging to 100% all the time risks overcharging. Charge to 90-98% instead.
3 – discharging to some point below 20% reduces battery life, avoid it. (I’m not sure what the lower bound is)
However, I have also been told:
A – always fully a discharge new battery and recharge fully 3 times before use – this is supposed to make batteries more prepared or something.
Vs
B – never fully discharge a battery.
Do we have anyone who works in the battery industry who can give us some real insight?
Rusty
From: plug-discuss-bounces@lists.plug.phoenix.az.us [mailto:plug-discuss-bounces@lists.plug.phoenix.az.us] On Behalf Of keith smith
Sent: Monday, July 23, 2012 9:05 AM
To: Main PLUG discussion list
Subject: Re: Laptop Battery Life
That would make sense. I still do not understand why my cellular battery lasted over 4 years and was still viable when retired. I had much less from laptop batteries.
------------------------
Keith Smith
--- On Sun, 7/22/12, Michael Havens <bmike1@gmail.com> wrote:
From: Michael Havens <bmike1@gmail.com>
Subject: Re: Laptop Battery Life
To: "Main PLUG discussion list" <plug-discuss@lists.plug.phoenix.az.us>
Date: Sunday, July 22, 2012, 10:18 AM
I think it would because a rechargeable has a maximum amount of charge time on it. at least that is the way it USED to be! On Sun, Jul 22, 2012 at 9:12 AM, keith smith <klsmith2020@yahoo.com> wrote:
Sometime ago we discussed laptop battery life. I asked the question about leaving the battery out and if that would extend the life of the battery. I'm not sure that option was explored.
Last December I took the battery out of my two lap tops. I use both daily for about 15 or 16 continuous hours.
I have been thinking the batteries might be fully drained by now. Much to my surprise the newer laptop's battery was at 81% and the older laptop's battery was at 58%.
Both are taking a charge. After they are fully charged I will put them back in my desk drawer and charge them again in 3 to 6 months.
I've have had poor performance from laptop batteries and did not want to "cook" these. It will be interesting to see if this extends the life of the battery.
Any thoughts?
------------------------
Keith Smith
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