Can't tell if battery is fully charged or flat.

[Boeriemore]

What confuses me about some of my e-go batteries is that while charging the red light on the charger is on.
When it turns green it means that the battery is fully charged.
Testing the battery at this stage I get readings of about 3.4V, yet the batteries light flashes indicating that it is flat.
Can anyone explain where the problem lies?

 

[Vault]

I`ve just voltage tested two fully charged Ego battery`s, one a 650mah and one a 900mah (just to be sure) and both read 4.2v fully charged. I suggest your charger is mis-reading or giving the wrong indication. You are right in that Red means charging and Green means fully charged, try another charger first (they are cheaper than the battery ) and if the voltage is still below 4.1-4.2v then the battery is buggered

 

[cskent]

Some ego style batteries are regulated down to 3.2 or 3.4 volts from what I understand. You may have one of these.

 

[Vault]

Thats under load with a delivery device I believe, the ones I just tested are Ego-C and set in regulated mode (3.3v) yet still show 4.2v when tested on the multi-meter. This is a no-load test and one I believe the original poster used to get the 3.4v reading.

 

[Boeriemore]

I`ve just voltage tested two fully charged Ego battery`s, one a 650mah and one a 900mah (just to be sure) and both read 4.2v fully charged. I suggest your charger is mis-reading or giving the wrong indication. You are right in that Red means charging and Green means fully charged, try another charger first (they are cheaper than the battery ) and if the voltage is still below 4.1-4.2v then the battery is buggered

I have two chargers. I get a reading of 4.2v from the chargers and 3.4v from the charged batteries.
Most of my batteries work fine after charging, just the odd battery, while also giving a 3.4v reading, has
the light flashing, then off and produces no vapor. It would seem that batteries do pack up even if they appear
fully charged.

 

[Boeriemore]

I bought a mega 1000mah ego battery, charged it over night, it then gave a reading of
4.2v but is totally dead, no vapor, no nothing, a dud.

 

[iowajosh]

I have about 4 kgos that I have used a bunch. At one time or another they have all refused to charge ate some point. I swab out the connector with a qtip and alcohol before charging and it helps a lot. Also clean off the charger once in a while.

 

[Boeriemore]

I find that soaking threads in lemon juice for a few seconds makes them like new.