Best lithium battery??

[valkarst57]

Looking for the best lithium battery I can get. Recently bought a nitecore um20 and it doesn't charge my purple efest batteries..

 

[Zamazam]

You mean the charger, correct? get a Xtar. If if does not charge your batts, then it's defective, return it.

BTW: Look at other batteries than the Efest. Like the Samsung 25R's.

 

[Paratech]

I use Nitecore D4 and Xtar VC4
They both work great on all the batteries I have.

 

[Robert B]

Looking for the best lithium battery I can get. Recently bought a nitecore um20 and it doesn't charge my purple efest batteries..

Make sure you have a quality usb wall charger with at least 2amp output per port. I have a UM10, & a UM20 connected to one of these, as well as a Galaxy S6, and a Galaxy TabS, all connected and charging at the same time. Charges 3 18650's to 100% every time.

If you try and use a cheap under powered usb wall charger, your batteries will likely only charge to 90% or so.

 

[valkarst57]

You mean the charger, correct? get a Xtar. If if does not charge your batts, then it's defective, return it.

BTW: Look at other batteries than the Efest. Like the Samsung 25R's.

I'm pretty sure the charger is fine the box

Make sure you have a quality usb wall charger with at least 2amp output per port. I have a UM10, & a UM20 connected to one of these, as well as a Galaxy S6, and a Galaxy TabS, all connected and charging at the same time. Charges 3 18650's to 100% every time.

If you try and use a cheap under powered usb wall charger, your batteries will likely only charge to 90% or so.

My batteries aren't charging at all though.. it comes up EE when I try to charge them

 

[Robert B]

That code is "damaged battery" code. Have you tried any other batteries ? Also, someone on amazon reports the EE error when using a cheap wall charger. A quality wall charger fixed his problem.

 

[vap3r]

The best lithium battery charger you can buy is a reputable RC charger. From Shutlze to HiTEC to Thunder Power and beyond, a quality RC charger bests anything from XTAR, Nitecore, Opus or Efest. Drawback is that unless you choose a dual port charger, you will need to wire up your own leads for the series/parallel balance charging of multiple cells (series is simpler and faster, parallel is more complicated but safer). Advantages of an RC charger over your typical 18650 bay charger include charge/discharge cycling to verify capacity, support for measuring IR and greater I/V control over the charging process.

 

[suprtrkr]

+1 I suspect bad batteries or a too-low output wall wart. And ditch those efests. Samsung 25Rs, LG HE2s or HG2s, Sony VTC4s. That's where you need to be.

 

[valkarst57]

+1 I suspect bad batteries or a too-low output wall wart. And ditch those efests. Samsung 25Rs, LG HE2s or HG2s, Sony VTC4s. That's where you need to be.

thank you i just picked up some sony vtc 4's and some lg he2's what a coincidence haha again thank you for the post

 

[valkarst57]

+1 I suspect bad batteries or a too-low output wall wart. And ditch those efests. Samsung 25Rs, LG HE2s or HG2s, Sony VTC4s. That's where you need to be.

but my lg's aren't charging at the same rate... I'm not sure what to do about this would you have any ideas?

 

[suprtrkr]

but my lg's aren't charging at the same rate... I'm not sure what to do about this would you have any ideas?

I am not certain I understand you. You have them side by side in the same charger, and one takes longer than the other?

 

[valkarst57]

I am not certain I understand you. You have them side by side in the same charger, and one takes longer than the other?

yeah

 

[suprtrkr]

Ok, several possibilities: your mod might be hitting one battery harder than the other-- that's bad news, if I have to tell you-- or your charger charges the slots at different rates. The latter is not a problem. The reason we marry pairs is to keep the same number of cycles on them, but if one of them charges slower than the other, no big deal, provided they stay together. Or it could be you just happen to have gotten a bad battery. If you have a meter, check the charge states when they come out of the mod next time. That will confirm or refute the first issue. If it's not that, it's in the charger or a bad battery. To figure that out, mark the batteries and trade slots, seeing if you have one bad battery, or if you have different charging rates.