When discussing multi-battery banks it is common to describe the electrical layout with a particular notation.

p = parallel
s = series

Examples:

• 2p1s - two batteries in parallel, as one finds in the common 2x6v GC battery setup
• 1p2s - two batteries in series, as one finds in 2x12v 24v systems
• 2p2s - two batteries in parallel, linked in series to another set of batteries in parallel, as one finds in higher-capacity 2×2 6v setups
• 1p1s - a single battery