what the heck do all the numbers mean on batterys? I'm going to have a 899si ff, lights and power for my cell phone and I want a battery that can last 10 or so hours with power to spare. also I want cheap and light! so what are my options guys? I like the idea of these 2.

http://smile.amazon.com/TalentCell-Recha...hf_yast_p_img_3

http://smile.amazon.com/Talentcell-Lithi...61X98DG2AMZ3NJK

and then I see a guy using this one.

http://smile.amazon.com/Battery-Tender-B...BVTZSSZJXWKE9VZ

HELP!!!! thanks guys I know you will guide me thru this!

I have the Battery tender you posted. But I have the one rated for 24ah. It powers my Helix 7 and SuperNova's fine all day.

Inexpensive, Light, Long lasting (High amp hours).

Pick 2.

Battery tech really hasn't evolved much. If you're planning on deep cycling a battery, you're going to want a marine grade lead acid, which means HEAVY (duh, Pb).

You could do a NiCad, but for a good one that will recharge and give you good lifespan, you're going to fork out the $$$. Really, don't even consider Li-ion, if you deep cycle them, you kill them. They also run hot if you discharge them too quicky, and CAN burst into fire.

Honestly, you're already on a small boat (the PA), might as well get a good long charge holding deep cycle marine battery.

I'd recommend a LiFePO4 (Lithium Iron Phosphate) Battery in a 20-30 Ah rating, depending on the lights you plan on running and for how long. I would also verify the battery has BMS (Battery Management System) to provide over charge and over discharge protection. The LiFePO4 batteries have a good safety rating, they are more $ upfront but due to their higher life cycles and life expectancy cost should more tolerable.
IMO, all the requirements you want in a battery don't really go with the word cheap.

If you go this route, be sure and get a charger for this type battery.

Thank yall for answering! I ended up going with the 24AH Battery Tender. So much for cheap! Thanks again for your responses!