How to check charger and battery issue by voltage meter?

In this video we are going to show you how to use voltage meter to check Cyrusher XF650, XF800 and XF900 battery issues as following:

1.How to check the charger is working or not ?
2.How to check the charger is working on NO.1 and NO.2 or NO.1 and NO.3 pin?
3.How to check the battery is full real full charged or not ? (Huge difference Shorter Riding Issue)
4.How to check the battery input holes is NO.1 and NO.2 or NO.1 and NO.3 hole?
5.How to check the battery output hole is working or not ? ( If your battery is full charged but unable to turn on the bike computer)
6.How to identify battery key number in case you need spare key from Cyrusher Sports?

Hopefully, this video is useful.

[LZScout]

I thought your presentation was very good. Also, I didn’t have any problem understanding you. You gave me the information I was looking for.

[davidkeppler]

My charger was showing green even when the battery was discharged, I wasn't sure if it was a battery or charger problem. This video enabled me to diagnose a charger problem and when I undid the connecting plug I found one wire hanging off! Quick solder and all is well again. Thank you for the video, could have been a long expensive process to determine the problem otherwise.

[kimbeadle]

Thank you for this, I ran some tests with my multimeter, as you showed, and it helped me diagnose the battery as faulty

[xiaobai]

my charger only has one prong.. how do i test it without a short, or does it matter?

[ATCRyderX]

Randomly clicked this...was gonna just leave a troll comment & be on my way....but I gotta say putting the paper in between the pins is just such a simple brilliant move! I learned a new trick - look at me! Thanks, buddy!

[fatdaddyurbanstore]

Hi! Thanks for this video. Just a little question. Is the charger plugged to current while you test it? The battery needs to be on, right? What if I get sparks when using the tester? Hope you can give me advice.

[kobir]

When not using the charger should we leave it on or off?

[edmunddrozek]

This video Demo on using a voltmeter for battery testing will be helpful for those without electrical testing experience. However, Not mentioned here is the battery mount plate that is attached to the bike! If good battery but no power to the motor that part could be the root cause. If testing just that adapter plate remove the battery and use the resistance (ohms) feature in your DMM (Digital Multi- Meter). Good luck!

[mrjaybennett]

When checking the prongs (4 or 5 pin) you have to check more than just the + and - you have to check the prongs in between as well as they have wires (green, red, yellow) and they can be easily separated from the prong as these wires are really thin. They all should have same voltage except for the green ground wire which should carry very little voltage.

[alaingillot]

Also, if the charger feels warm after a few minutes, while connected to battery, it is working .

[dannymcdonald]

Why is 3 out of the 4 lights on my battery lighting up when fully charged

[davidcoles]

I had a big spark as soon as I put the probes in to ports 1 and 2 on the battery!

[OrganicLithiumFarm]

Hi so your example that this battery is ok right? I have a situation where it charges completely but shorter mileage? What's the problem there?

[mastadon]

On both my charger and battery, the center pin is not connected to anything. The battery worked for a while.
What is the center pin/hold supposed to be connected to?

[ChrisBFerguson]

Would checking the voltage on a multimeter regularly be helpful for preventing fires?

[jamesl]

Hi, I've just got my new ebike but it won't charge, the charger light stays on green at all time even my battery is empty, what could be causing this? Tks!

[nimur]

My new 36v battery fully charged gives a reading of 40v! Is that a problem?

[StefanRandall]

Looks like you had to modify your charger terminals? For just this situation

[willscott]

Yeah if you look at that connection it's pretty much self-explanatory.

[reyadhocine]

Is it possible to replace the LEDs, knowing that the battery is intact, but when connected to a charger, it does not charge