umm, do you really trust your voltmeter? if it's an old D'Arsonval (pointer) type, don't. if it's a modern-ish DVM, check it. if it's a quality brand name, eg. Fluke, maybe blind trust is OK. if you paid less than $50 i'd double-check it. if it's old, double-check it.
i do this stuff for a living. 20 years ago, "within a volt" was OK. no longer!
Fluke makes great meters. you can get decent ones under $100. battery life is directly proportional to charge quality... and you need a good meter to test it.
cheap meters can be OK, but I'd check 'em against a drop-dead-known voltage.
Last edited by tom jennings; 01/17/16 05:22 AM.
