well i made some changes..
New radio:
2PL FM R153F 1 S3003 75 79
https://www2.towerhobbies.com/cgi-b...&I=LXNHS279&P=0
Different brand battery:
SMC IB4200 6-Cell 4200mAh NiMH Stick Pack
seems to be a better brand from readings, plus there cheaper by 5$
and a better charger
DuraTrax IntelliPeak AC/DC Pulse Charger