24th April 2005, 04:34 AM
24th April 2005, 08:23 AM
plenty of good and cheap multimeters in Sim Lim Tower. Even got those with 0.01 volt accuracy. Great for testing batteries and deciding which to discard.
24th April 2005, 08:47 PM
but multimeters don't really tell much about remaining battery life right? they just tell the voltage and current the battery can still provide.
NiMH, lithium-ion, NiCd and lithium batteries are good at holding up their voltage until the last bit of juice...
only carbon zinc and alkaline batteries show voltage drops in its service life... i think
24th April 2005, 09:11 PM
NiMH and NiCd hold their voltage fairly constant at 1.2v until they're almost fully discharge where the voltage drops suddenly. A freshly charged cell will measure 1.4v for a while.
Originally Posted by fuzzy
Lithium cells actually gain voltage as they discharge.
Your typical battery checker actually checks voltage or current. You'll probably need a more complex circuit (more exp.) to do a true check.