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I have xiaomi robot vaccum cleaner which doesn't work at all.It seems that If I docked it with my own hands It is possible to charge robot vaccum cleaner But It seems that It suddenly discontinue to charge and If I undocked it It is impossible to power on... So I doubt its Li-iron battery has been broken or not.

below picture is a Li-ion battery which I want to check it.

Li-ion batteryHow can I test Li-ion battery? How can I test Li-ion battery whether it have been broken or not?

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  • \$\begingroup\$ What tools you have or how much you can spend to build an electronics lab where testing of lithium batteries is possible? \$\endgroup\$
    – Justme
    Commented Oct 14 at 5:59
  • \$\begingroup\$ Is it impossible to measure voltage of lithium batteries with multimeter? \$\endgroup\$
    – bshi02
    Commented Oct 14 at 7:40
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    \$\begingroup\$ You can measure the voltage but that won't tell you whether it's the battery or the charging circuits that are faulty. \$\endgroup\$
    – Finbarr
    Commented Oct 14 at 8:30
  • \$\begingroup\$ This lithium batteries has 4 pin(red,white,blue,black) connector. what pin should I measure with DMM? i.ibb.co/WpLFKXS/IMG-20241014-183821.jpg \$\endgroup\$
    – bshi02
    Commented Oct 14 at 9:47

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