26650 Double Test: TrustFire Protected and King Kong ICR26650 from Wallbuys

2 posts / 0 new
Last post
Last seen: 1 week 2 days ago
Joined: 05/08/2012 - 12:13
Posts: 310
Location: Czech Republic
26650 Double Test: TrustFire Protected and King Kong ICR26650 from Wallbuys

I don’t like the voltage it arrived at. I don’t like the capacity. I definitely don’t like the internal resistance. Also I don’t like the unmatched capacity.

In spite of the fancy hologram it got confirmed that you never know what you get when ordering UF/TF batteries. Could be old, could be crap, but probably both.

Considering the size difference, the capacity increase over 18650 is only marginal. Count in a fact these noname cell age faster than branded cells and you can get in an 18650 capacity territory as fast as year and few dozen cycles, but with a higher internal resistance.

An 18650 equivalent would be 1900 and 1850 mAh. I wouldn’t pay more than 1 buck for such laptop pull so value is roughly 2 USD a piece.

Internal resistance was a bit tricky to read because of the protection plate and/or protection itself. The lowest readings were around 70miliohms. This value is especially bad compared to KK with 4 times lower IR while still having 16% more capacity.

Interal resistance is really outstanding. It’s lower than any IMR,INR, CGR or LIFEPO4 I own. By only few miliohms, but still.

Edited by: Milan on 10/15/2013 - 13:35
MRsDNF's picture
Last seen: 2 months 5 days ago
Joined: 12/22/2011 - 21:18
Posts: 13473
Location: A light beam away from the missus in the land of Aus.

Thanks Milan. Interesting test. I have never bought batteries from Wallbuys and wont be buying Trustfires from them. I have bought about 15 Trustfires 26650’s elsewhere and none have been close to your figures.


djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.