Another good test is charge up the battery, then set it aside for a few days. If the voltage drops quite a bit from the fully charged state - the battery is bad.
Your video made me want to finally get a multimeter. One thing to note: A voltage that is under the nominal voltage (say nominal is 7.2 and the reading is 6) also means the battery is bad, correct? It doesn't have to be 0.
Hi there! I am glad you got one. If the battery is fully charged and the meter is reading only 6 volts instead of the nominal voltage, yes, you have a damaged battery pack.
There's not danger when you connect probes to measure a device, so if you can't see a +/- label, just try them all until you get something close to what the voltage should read. Or at least, which would indicate that you're measuring some voltage.
My multi-tester has a "Battery Load Test" option that registers voltage but also shows a Good-Questionabe-Bad indication. One of my NP-Z100 batteries showed 7.6 volts, but a "questionable" status. When I put in on my charger, the charger doesn't even acknowledge it is connected? I guess it's done!
I'm sorry. But you can't just put a batter on a multimeter. To test battery health you must put the battery under load. Can simulate this with the proper sized resister. Hundred ohms might be a start for a battery like this. Some multimeters have this capability. Not the Harbor Freight ones though. If these are "smart" batteries, all bets are off. Then it's not so simple.
Another good test is charge up the battery, then set it aside for a few days. If the voltage drops quite a bit from the fully charged state - the battery is bad.
Some batteries have a smart BMS like the ones in drones. If that's the case the voltage will drop over a few days (Which is Normal).
Thanks.It is really helpful also your voice is clear and easy to understand.
Hey I have the same Harbor Freight multimeter 😎👍
Your video made me want to finally get a multimeter. One thing to note: A voltage that is under the nominal voltage (say nominal is 7.2 and the reading is 6) also means the battery is bad, correct? It doesn't have to be 0.
Hi there! I am glad you got one. If the battery is fully charged and the meter is reading only 6 volts instead of the nominal voltage, yes, you have a damaged battery pack.
@@MomentumProductions1992 thanks! My multimeter arrived yesterday and I'll be testing some batteries over the weekend.
Awesome!! Thanks !!
There appear to be three contacts on the battery. Which two do you apply the probes to?
(+) and (-) contacts, because the other one usually for ground position
There's not danger when you connect probes to measure a device, so if you can't see a +/- label, just try them all until you get something close to what the voltage should read. Or at least, which would indicate that you're measuring some voltage.
Thanks
My multi-tester has a "Battery Load Test" option that registers voltage but also shows a Good-Questionabe-Bad indication. One of my NP-Z100 batteries showed 7.6 volts, but a "questionable" status. When I put in on my charger, the charger doesn't even acknowledge it is connected? I guess it's done!
Try a different charger!
@@MomentumProductions1992 I actually tried three different chargers.
Good to know!
I'm sorry. But you can't just put a batter on a multimeter. To test battery health you must put the battery under load. Can simulate this with the proper sized resister. Hundred ohms might be a start for a battery like this. Some multimeters have this capability. Not the Harbor Freight ones though. If these are "smart" batteries, all bets are off. Then it's not so simple.