For the 1.5-volt group (AAA, AA, C and D batteries), we arranged the circuit loads in parallel, increasing the number of loads according to the capacity of the battery.
These batteries look very similar to standard Alkaline AA batteries, but instead are powered by Lithium and — more importantly — are rechargeable. While they cost more than a standard ...
They better withstand cold temperatures. They're readily available as 9v batteries as well as C, D, AA and AAA sizes. A lithium option is more expensive upfront and their shelf life is typically ...