On Mon, Nov 07, 2016 at 11:52:24AM +1300, Brent Brown wrote: > On 6 Nov 2016 at 22:31, Chris McSweeny wrote: >=20 > > It's not that that's the issue. This is for an external battery = for > > something which also has an internal battery. When the external battery= is > > unplugged it will switch to the internal battery, but apparently that's= not > > happening when the external battery is left plugged in but runs flat. >=20 > Typically (but I appreciate this could be inappropriate for any > number of reasons) one might include diodes so the battery with the > highest voltage supplies power. Seamless switch-over when either > battery goes flat. Or ideal diodes made from p-channel MOSFETs? My guess is that the something else isn't to be hacked. --=20 James Cameron http://quozl.netrek.org/ --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .