Reddit reviews Interstate Batteries 12V 5AH Sealed Lead Acid (SLA) Battery (AGM) - .187 FASTON Spade Terminals (SLA1055)
We found 3 Reddit comments about Interstate Batteries 12V 5AH Sealed Lead Acid (SLA) Battery (AGM) - .187 FASTON Spade Terminals (SLA1055). Here are the top ones, ranked by their Reddit score.
Great replacement battery uses include home security systems, push mowers, electric mowers, Murray riding lawnmowers, burglar alarms, and moreVRLA technology to eliminate spills and overpressureGenuine Interstate Batteries 12 volt 5 ah sealed lead acid battery back by a 12 month warranty.Great replacement battery uses include home security systems, push mowers, electric mowers, Murray riding lawnmowers, burglar alarms, and moreRechargeable, Maintenance-free and spill proof because of the VRLA (valve regulated) technology that eliminates spills and overpressure.
All of those in series would give you 12 volts, but assuming 1800 milliamp-hours (mAh) it would only power the lights for 1.2 continuous hours.
I found this quote "AA alkaline cells have their capacity rated at only 25mA and an end voltage of only 0.8V per cell. At 500mA their capacity is half.
At 0.5A and 1A their voltage quickly drops like a rock."
From this forum: http://www.electro-tech-online.com/general-electronics-chat/100526-aa-battery-max-current-draw.html
So you may have voltage problems with 1.5 amps flowing through those AA's.
Check out something like BigSlowTarget suggests, for example: http://www.amazon.com/Rechargeable-Sealed-Lead-Acid-Battery/dp/B000BPCUXO
If you look at the description, it says it's only "3.5 x 2.8 x 4.1 inches ; 3.9 pounds", which is comparable to a block of AA's. The SLA batteries should be rechargeable too, but you'd need to buy a charger for them.
20W x 3 hours = 60Wh
So you need a 12v battery rated at 5Ah I guess....
http://www.amazon.com/gp/aw/d/B000BPCUXO/ref=redir_mdp_mobile
Let me see what it costs, if it's not too bad I'll save you the trouble. You can buy these on-line for $15 with free shipping , so I want to make sure we can keep the shipping under that, otherwise it's cheaper for you to just buy a new one. ;-)