Steve Halla wrote: > Which PDA is it, as control methodology is slightly different for many PDA's? > Sharp Zaurus SL-5500. I've tested straight 3.6V through the battery connections, and through the battery logic into the battery connections. Same as always, diag OK, no normal turn-on. I think I noticed it needed the charger for a second with the original battery after disconnecting it to be able to turn on, which it has never needed before. I think the backup battery has something to do with this, since it's disconnected right now. I'll connect it and test. If it comes out to be the culprit (I thought all that whould happen is that the RAM would be erased if it loses total power, but it may also have something to do with the charging circuitry) now I have to emulate *two* batteries. I need to do more testing. I might just as well leave the batteries connected normally and hope that the main power supply can cope with the charging. Regards, -- Hector Martin (hector@marcansoft.com) Public Key: http://www.marcansoft.com/hector.asc -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist