Upgrading the Viper kit to Lipo (Lithium Polymer) batteries
Want to replace the Viper kit's 9V batteries with rechargeable lipoly batteries? It's easy! You just need to choose a battery, and have a charger for it.
This rechargeable 11.1V 300mAh lipo battery fits nicely into the Viper kits. It will last around an hour on a full charge. If you want longer run times, choose any of the bigger 3S lipos. We recommend going with 3-cell lipolys (11.1V) rather than 2-cell (7.4V) because you will get an increase in speed over the 9V batteries.
Those batteries will use the JST connector that come with the Viper kit instead of the 9V snap adaptor.