Nitecore i2: 4.17V-4.18V Good Enough?

Batteries and Chargers Chargers
1

I received a Nitecore i2 charger awhile back. I really like it as it charges so many different size cells. I know a 100% charged cell should read 4.2V fresh off the charger. I’ve been getting readings of 4.17V and 4.18V on all sizes of Li-Ion cells that I’ve charged.

My question is, is 4.17V-4.18V good enough for the cells. Thanks.

2

Yes. It's better than over charging by the same amount. Your batteries will live longer. Few chargers stop right at 4.20V.

3

Yes

-Garry

4

+1, that's fine. Your cells will live longer. I have tested lots of different chargers and it is rare to get one that stops exactly at 4.20v, I think that most of them give themselves +- 0.05v. My i4 stops at 4.22v. You are giving up a few mA by not going exactly to 4.20v, but really it isn't enough to be concerned about.

5

My i2 goes to 4.19-4.20 depending in the cell. My i4 goes to 4.20 and sometimes 4.21.

Like others said 4.17-4.18 is fine, within the +/- .05v.

6

may i know which charger that exactly stop at 4.2v?

7

www.mtnelectronics.com/opencart/index.php?route=product/product&product_id=232

8

Thanks for the quick replies folks. I figured 4.17V was okay and just wanted to know that the cells were getting full enough.

9

I don't think that I (or anybody else) can guarantee that any charger will stop at exactly 4.2v. There are too many different cells and too much component and production tolerance to hit that exact voltage every time, which is why just about every manufacturer has the +- 0.05v specification.

10

Yes

Actually it will help with lower stress on the battery internal chemistry and structure and have the batteries have more recharge cycles

11

thank you 0:)

12

4.17-4.18v is full

batteries are at 4.2v on the charger and its normal for them to go to 4.18 when you take them off

13

Usually, the 4.7 to 4.19 volts is immediately after the lights stop blinking. I leave my cells for about ten minutes more and I get a reading of 4.2 volts after taking it off.

14

My xtar VP2 stops right at 4.20. This is most accurate charger I’ve had. But after some time voltage drops anyway. After an hour or so some stay at 4.19, some at 4.15 but that depends on cell itself.