"At no extra cost."
Those four words came from Bioenno Power when I asked for the tracking number for a 12V 9AH battery I'd ordered several days earlier. They said that it was back-ordered and wouldn't ship for some time.
Before I could say "Cancel the order, I'll go with Dakota Lithium" they said I could have a 12V 12AH battery and they could ship it immediately "at no extra cost."
12 AH for the price of 9.....I'll take it.
The four-cell LiFePO4 battery arrived two days later via UPS. I charged it, discharged it and charged it again.
Then I hooked it up to my battery analyzer and set it to discharge at a 3 amp rate.
With many battery types of various sizes and chemistries over the years, this is the first time I've ever tested a battery at a sizeable discharge rate and gotten more capacity than advertised. Usually, a battery only meets its advertised capacity when discharged at a rate that wouldn't even power a wristwatch.
A few hours later, I charged the battery again, then discharged it into the analyzer at a 6 amp rate:
Needless to say, I'm happy with the battery's performance, though if I had it to do over again, I might wait until the 9AH version was back in stock.
12AH will power my IC-705 and Hardrock-50 amp for 10+ hours - more time than I'll ever use it for a park activation.
About the chemistry: this is the first LiFePO4 battery I've ever had and it seems to hit the sweet spot in regards to voltage provided under a load - about 13 volts.
Three-cell LiIon and LiPo batteries under a load typical of the IC-705 provide about 11.8V. Four-cell versions would provide 15.7V. Too little and too much, respectively, for radios designed for 13.8 volts.