Do I need new batteries or new charger?

[Kanthal]

For the past week or so I have noticed that both of my purple Efest 35A have been dying and recharging way too fast.

I charge them to a full 4.20v and within 2 hours they have already dropped to 3.6v. I throw them back onto the charger and they fully recharge in less than 15 mins.
Something definitely isn't right. The charger I'm using is a TENERGY TN270. I'm pretty sure this charger was made for unprotected ICR batteries.

 

[sparkky1]

How many charges have you made on that battery since you bought it ?

 

[Kanthal]

How many charges have you made on that battery since you bought it ?

lol. More than I can count.I bought both of these batteries back in April. I'm guessing it's time for new batteries.

 

[sparkky1]

Those battery's average about 300 - 500 cycles for there life span, really depends on how low or hard they have been driven.

This would be a good investment :http://www.xtardirect.com/collections/chargers/products/xtar-vc2-charger

 

[VHRB2014]

For the cost of one battery you cold buy a multi meter and know what the charger is putting out.

The two hours sounds OK, that about how long mine will last since I sub ohm, and vape like a chimney. But the 15 minutes to full charge does suggest they might be worn out. Mine usually need about hour and half on a D4 intelicharger.

 

[Kanthal]

I have a multi meter. How do I go about testing what my battery charger is putting out? I know how to test ohm resistance on my (coils) attys ,and test volts on batteries with it ,but that's about all.

 

[crxess]

Send them to me. Still plenty of life and you are never dropping them low enough to set a decent base line.

You say they are dropping to 3.6 in 2 hours. I assume you mean 2 hours use? What Ohm coils are you running? Are you vaping more than normal?
Charging Fast to 4.2v indicates the batteries are still near fully charged.

Yes you need new batteries and a new charger. Any excuse to accumulate new gear.

 

[VHRB2014]

I have a multi meter. How do I go about testing what my battery charger is putting out? I know how to test ohm resistance on my (coils) attys ,and test volts on batteries with it ,but that's about all.

It depends on your MM and your charger. Some chargers wont even put out if there is no battery in them, so you may have to hold the leads in between the battery and the charging posts. But even then, you should be able tell if its putting out voltage, and with the amp section of your meter you should be able to pick up how many milli amps it trying to put into the battery.

Here`s a quick primer on using them, it should help a bit.
https://learn.sparkfun.com/tutorials/how-to-use-a-multimeter