Battery Tester - is it any good?

[cpedw]

I just came across this at Banggood.

It seems to be able to assess battery capacity if you've got a suitable load to hand (maybe a filament bulb?).

I don't know enough to assess its usefulness though £7 seems a remarkable price; any opinions?

Derek

 

[VicS]

I just came across this at Banggood.

It seems to be able to assess battery capacity if you've got a suitable load to hand (maybe a filament bulb?).

I don't know enough to assess its usefulness though £7 seems a remarkable price; any opinions?

Derek

I can't work out just what it is supposed to be or do

I cannot help thinking that an inexpensive multimeter would be more useful unless you can see a particular use for any of its " features"

Eg https://www.banggood.com/DT832-Digi...n-with-Test-Probe-p-1119906.html?rmmds=search

 

[Yngmar]

It's a simple energy meter, counting Ah or Wh passing through it. Pictures show it used with a high power (cooling fins or ceramic) resistor on the load side, which would simply discharge the battery into heat and count the energy passing through the meter in the process.

Since it has no low-voltage switch-off or regulation of any kind, you will then know exactly how much energy your battery had before you killed it by deep discharging. You may also start a fire if you leave a ceramic resistor laying on the table as depicted, as they can get very, very hot.

Of course you can just monitor the voltage manually and use a suitably sized load (but note that lead-acid battery capacity varies with discharge rate), then stop the experiment before the battery is deep discharged, which should give you a rough idea of the usable capacity, but it's not a great way of doing this.

 

[QBhoy]

Hi
I'd be tempted to just buy a semi decent multi meter...so useful on a boat.

 

[William_H]

This device could be usefully set up as a consumption meter on domestic loads then switch it or have another one to measure recharge although limited to 15Amps. It is in effect an amp hour counting device. One line of description is very confusing about a "siren" I can't guess what that is unless it has in effect a low voltage warning. But remember there is this huge advantage of being in Chinese or English. Of course it does give amps and volts. Got to be a use for it. olewill