Look what popped into my inbox late last night

[jazclrint]

http://www.racetech.com/EmailList/Ne...Batteries.html

[BaldBruce]

200 bucks for 4 Ah????

[chef]

Yeah that's awfully pricey. 13.2v nominal sounds like 4x LFP cells in series (4x 3.3v). 15v max -> 3.75v/cell which agrees. But it does 52C peak discharge. Specifications:
* Cranking Amps: 240
* Capacity: 4.6 Amp-Hours --> [240/4.6 = 52C, but for how long?]
* Nominal Voltage: 13.2 Volts
* Max Charging Voltage: 15.0 Volts
* Weight: 1.8 lbs. (817 grams)
* Dimensions: 115mm wide x 75 deep x 65 tall (4.5" x 3 x 2.6)

This Lightning 60Wh battery costs $200 ($3.33/Wh). A Headway 32Wh (38120) is maybe $20 ($0.62/Wh). CALB 128Wh is $55 ($0.43/Wh). Any guesses what super-duper-special technology they're using?

Edit: Looks like they have a built-in BMS for the 4 series cells.

[Harold in CR]

Is this not a starter battery, for gas engine Motos ?? That's the way I read it ??

[teddillard]

Is this not a starter battery, for gas engine Motos ?? That's the way I read it ??

Yes. That's exactly what the copy says. It's a different market, so maybe there's potential for a turnkey setup. They wouldn't be into the DIY approach on the BMS and all.

[larryrose11]

On energy density:
13.2v nominal * 4.6 Amp-Hours / .817 Kg = 74 Wh/Kg

Granted, this does include a BMS, but that is still pre-tay stinky