Subj : Re: Charger To : TOM WALKER From : BEN RITCHEY Date : Thu Jun 09 2005 12:21 am * An ongoing debate between Tom Walker and Ben Ritchey rages on ... BR>> Ok, but my question still stands what voltage to use when doing BR>> a long-t maintenance float on NiMH batteries ??? BR>> FYI, my research has discovered that Lead Acid cells need 1.085x BR>> and rechargable alkaline/lithium use 1.02x ... but NiMH? | TW> According to Panasonic, A Large manfacturer of Top Quanlity NiMH | TW> cells "Trickle Charging" for maintenance of NiMH cells is NOT Good stuff, thanks. I'll certainly keep for reference though I am hoping for a simple solution that works with V-Reg (i.e. trickle) unless I can locate an ASIC that does the fancy stuff with variable loads. (?) My application consists of two parallel banks of 5 cells each (single "A" NiMH pulls, probably from older Laptop packs or similar) for 6 VDC @ 6 AH (yes, each cell is rated 3.5AH so I'm assuming I can get at least 3 AH each). I have a Timex Diehard (flashlight that plugs into AC and kicks on automatically when power fails or when it's pulled out for use) that used rechargeable NiCds originally. I replaced them with two of these "A" NiMH cells a year ago and it's working great still. Circuit seems to be a simple trickle charger using V-Reg ... no heat issues to date. -- Be well :^) : Ben aka cMech http://bellsouthpwp.net/c/m/cmech617/ : + WildCat! Board 24/7 +1-337-232-4155 V92 56k 8,N,1 --- GoldEd+/DOS v1.1.5cM * Origin: FIDONet - The Positronium Repository (1:393/68) .