In the image above is the top of a POWERhandle. The 2 red lines on the POWERhandle indicate the + and - connections which are used to charge the POWERhandle, the green line indicates a communication contact which is also used during charging. Take care not to short circuit any of the connections as this could damage the battery and cause burns or harm to people or property.
A voltage tester set to detect 200V DC will be able to read the fully charged voltage of approximately 23V DC when pressed into the 2 contacts indicated with red lines. Many voltage testers have a range up to 20V DC and another up to 200V DC, if you cannot get a reading in the 200V range try switching to 20V range and test again.
This method can be used to test lithium ion and other battery types, the voltage reading is in the same range but different results may indicate a fault on one chemical type while on anther the voltage is ok.
In some cases there is a loose or broken connection somewhere in the battery, this can be repaired for free or at a low cost if returned to CEL for inspection but must be requested by a service agent and include the relevant, completed form. Items posted to us may not be returned or compensated.
Lithium Ion POWERhandles
If the voltage is lower than 15V DC then there is most likely at least one failed cell inside the pack. If the voltage is near or over 18V then it may just need a recovery as shown here.
NiCad or NiMH POWERhandles
These cells are more resilient to low voltage than Li-ion cells, the recovery method will usually revive a low voltage battery. If a voltage is very low there may be a broken connection inside the battery pack.
Cells should only be replaced by an authorised service agent or the manufacturer. Opening the casing or removing any screws may only be done at your own risk, CEL and its agents will not accept any liability for harm or damage from these actions.