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 wrote: From: Michael Havens Subject: Re: Laptop Battery Life To: "Main PLUG discussion list" 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 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 --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss -- :-)~MIKE~(-: -----Inline Attachment Follows----- --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change your mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss