Battery charge rates

[pxr5]

Hi all,

I understand that you can charge vtc4 and vtc5 batteries at 2A, but what about the likes of a panny 3400mah or a more standard 2600 mah. I've been looking at Torchy's batteries on eBay and charge rate isn't stated. Is there somewhere this information is available. If not is it OK to use 1A as standard as I've seen some batteries with 850mah charge rate

[DiscoDes]

most 18650's are ok at 1A

[pxr5]

Thanks, and the consequences of charging at 2A?

[DiscoDes]

Possibly ok as well but the harder you push a battery the shorter the life.

I charge mine at 1A. But I have quite a few of them so time is not a issue

I'm looking for some charging tables........

[DiscoDes]

Excerpt from The Battery University: HERE

The charge rate of a typical consumer Li-ion battery is between 0.5 and 1C in Stage 1, and the charge time is about three hours. Manufacturers recommend charging the 18650 cell at 0.8C or less. Charge efficiency is 97 to 99 percent and the cell remains cool during charge. Some Li-ion packs may experience a temperature rise of about 5ºC (9ºF) when reaching full charge. This could be due to the protection circuit and/or elevated internal resistance. Full charge occurs when the battery reaches the voltage threshold and the current drops to three percent of the rated current. A battery is also considered fully charged if the current levels off and cannot go down further. Elevated self-discharge might be the cause of this condition.

Increasing the charge current does not hasten the full-charge state by much. Although the battery reaches the voltage peak quicker with a fast charge, the saturation charge will take longer accordingly. The amount of charge current applied simply alters the time required for each stage; Stage 1 will be shorter but the saturation Stage 2 will take longer. A high current charge will, however, quickly fill the battery to about 70 percent.

[VapingBad]

The Panasonic NCR18650B MH12210 3400 mAh fast charge rate is 3.4 A, large capacity means your C rate is higher, but I would always try and find the spec sheet.

How to Prolong Lithium-based Batteries

[pxr5]

Cheers for the replies guys. The panny you refer to, is it the same 3400mah that tor hy sells?

[VapingBad]

Sept 8, 2014 21:02:40 GMT pxr5 said:

Cheers for the replies guys. The panny you refer to, is it the same 3400mah that tor hy sells?

I don't know, its the max charge rate quoted at 3.4 A or 1 C, if he doesn't list it he should be able to tell you.