Adam Sampson's battery bookmarkshttps://bookmarks.offog.org/ats/batteryAdam Sampson2015-11-17T19:42:08ZLee Hart's Lead-Acid Battery Charging Basicshttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.evdl.org%2Fpages%2Fhartcharge.html2015-11-17T19:42:08ZA nice summary of how to charge a lead-acid battery. It works.The Life of Kenneth: 555 Constant Current Lead-Acid Battery Chargerhttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fblog.thelifeofkenneth.com%2F2013%2F01%2F555-constant-current-lead-acid-battery.html2015-11-15T17:24:15ZTo implement the state machine of a lead-acid battery charger, you need a couple of comparators and a flip-flop. Which is what's in a 555! Neat design.Hardware and Firmware Issues in Using Ultra-Low Power MCUshttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.ganssle.com%2Freports%2Fultra-low-power-design.html2015-01-18T00:19:28Z"This report describes the hardware and firmware issues one must consider when designing very low-power coin-cell products." I imagine there are other concerns as well, but lots of interesting stuff here.Flashlight informationhttps://bookmarks.offog.org/edit?url=http%3A%2F%2Flygte-info.dk%2F2014-12-20T16:07:06ZAnd batteries and chargers and LED drivers and and and. Very comprehensive, and the author's consistent in how different items are reviewed, so it's a good basis for comparison.Rechargeable Batteries and Battery Chargers - Battery Logic UKhttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.batterylogic.co.uk%2F2014-01-06T16:25:37Z(No notes.)Linux and electronics notes.https://bookmarks.offog.org/edit?url=http%3A%2F%2Fnicknorton.net%2F2013-03-24T21:04:14ZThere's a pretty spectacular demo of rewinding a transformer using a stepper motor to distribute the windings evenly -- and some other neat things, e.g. building a boost converted using an AVR, and measuring AA cell discharge rates.Battery Showdown — The Best AA Battery You Can Buy?https://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.batteryshowdown.com%2F2012-09-28T22:12:17ZA decent comparison of a wide range of AA brands. The executive summary is that within each chemistry, they're all nearly indistinguishable -- so (provided you stick to alkaline batteries, not zinc or lithium) you should just buy whatever's cheapest. Which works for me.BattMan II: Build a Computer Controlled Battery Managerhttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.stefanv.com%2Felectronics%2Fbattman2.html2012-07-28T13:48:10ZI'd been considering building something like this myself (having got fed up with generally crappy off-the-shelf battery chargers, which are generally enough of a pain to make it not worth me using rechargables). Looks good.Strikalite - the rechargable battery specialistshttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.strikalite.co.uk%2F2012-03-04T20:41:37ZReasonably-priced rebuilders of battery packs. I ought to get them to rebuild my IC-32E's battery box at some point.The Small Battery Companyhttps://bookmarks.offog.org/edit?url=http%3A%2F%2Fwww.smallbattery.company.org.uk%2F2005-08-21T22:17:57ZA company that sells small batteries. The FAQ's quite interesting.