If you want more batteries in the body, just duplicate, although since it'd be in parallel you fundamentally need a matching cells/pack with similar capacity (including recharge cycles).

Learn how engineers design electrical circuits by calculating the voltage, current and resistance of electrical components.

Depending How They’re Wired, two 12-Volt Batteries Yield a 12-Volt System with Double the Amps, a More Efficient 24-Volt System Twice the Cranking Speed.

About Those Series and Parallel Circuits Resistors, capacitors and inductors are easy once you understand the basics By Mark Persons Published: July 7, 2025 ...

Learn about and revise electrical circuits, charge, current, power and resistance with GCSE Bitesize Combined Science.