I use the trakpower in my B4 and i only need the one pack for the whole day. Charge it sometime before, race, then leave it to cool while i marshall, then stick it back on charge. I use the inline balancer to makesure everythings fine while charging, and thats it.
No faffing with equalizers and charging at the right time etc.
Takes about an hour to fully charge it at 5amps. or about 30mins to top up from half.
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