Yep, simply just charge them at usual rate right before racing them.
I'm running stock class exclusively, so personally, I prefer charging at 6,5 amps, any lower means less punch. But if you're having trouble with runtime, charge at a little lower rate.
And I reccommend following he advises about discharging to 5,4 volt minimum and dont charge them while warm. And do store them with a little charge on them.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250