I stand corrected on "Too-good-to-be-true LiFePO4 battery prices?"

Well this is embarassing...

My recent write-up (now deleted) of a Nermak 12V 12AH LiFePO4 battery unfairly cast that battery in a bad light.

The problem experienced at a 10 amp rate of discharge was due to external causes that had nothing to do with any fault inherent to the battery: the wiring harness used to connect the battery to the analyzer was only intermittently making good contact.

The same harness was used to connect the Bioenno battery, which showed good results at a 10-amp discharge rate.

What are the odds that the intermittent nature of the connection favored the Bioenno while casting doubt (two times!) on the Nermak? Yet that is what happened.

A new set of Power Pole connectors later, I re-ran the test on both batteries at all three discharge rates: 3 amps, 6 amps and 10 amps:

.

Red - Nermak; Green - Bioenno

.

Red - Nermak; Green - Bioenno

.

Red - Nermak; Green - Bioenno

 

As can be seen, the Nermak does come quite close to meeting its advertised capacity, delivering 11 amp-hours at all discharge rates. The price for this battery is excellent, even if we consider it an 11AH battery.

I put it in the real world today, activating K-1848 for 2-1/2 hours using my FT-891 at 100 watts. No problems whatsoever.

.

.