If you are needing 30amps output, LG HB2, HB4, HB6 1500mah 30amp
If you are needing a bit more mah (runtime) and not pulling 30amps, Samsung 30Q 3000mah 20amp, Sony VTC5A 2500mah 25amp, Samsung 25R 2500mah 20amp, LG HE2, HE4 2500mah 20amp, Sony VTC6 3000mah 20amp, LG HG2 3000mah 20amp, there are numerous models out there.