I'm trying to build one of these myself (TLDR;
It's a lighting setup for outdoor usage to illuminate a pingpong table).
I would like to know what sort of batteries are available that might help me power this.
I'm a novice and the only types of batteries I'm aware of are
AA/AAA batteries, button cells and car batteries.
Are there batteries that lie somewhere in the middle of this spectrum and are easily available?
I'm looking for a rechargeable battery that can power this setup for 2-3 hours.
I'm suspecting that the LED lamps might require somewhere around 20-30 watts.
As for the rest of the setup I'm thinking of using PVC pipes to build the stand
that holds up the lights and some sort of clamps at the bottom to clip it onto the
net of the pingpong table, while the battery itself can rest on the ground.
Best Answer
The next size up from AA is C. The next size up from C is D. You can get both of those in rechargeable, and a sufficient stack of them will cover you just fine.
Over in the lithium world, we have the common 18650 size which about the size of two C-batteries with more energy storage for their size.
Do not underestimate the design challenges of working with LEDs. Your best bet is to use lights designed to a standard voltage such as 12V "LED strips" and then use 12V batteries. For instance three lithiums or 10 NiMH batteries will give 12V. Most 12V LED assemblies are tolerant of 11-14V, since those are voltages that will come off a car battery at different times.