battery with easy charging method?

I am looking for the best way to implement a battery supply for my project. It needs to be able to fit in an enclosure measuring 5 x 2.5 x 2 inches. It needs to have a voltage in the range of 7 to 12 volts and have a fair amount of capacity. (maybe around 1500 - 5000 mAh?) The battery(s) also should be easy to charge, such as through a regulated voltage supply, with no complex control circuitry. It can be multiple batteries. I am mainly looking for the best type of battery here. (NiMH, SLA, Lithium, etc.) Any suggestions?

Comments

[iknowvations]

Consider using mobile phone batteries. You can stack them in your size - you can charge them easily - you can also get the capacity you want !

[brady911]

I actually decided that I would go to a similar option which involves lithium ion batteries. I have a setup with a protection and voltage regulation board.

[mpilchfamily]

Your looking for a SLA battery. They come in all shapes and sizes so start looking at what suppliers have to offer.

[brady911]

That was my first thought, but I can't find any that are small enough to fit.

[mpilchfamily]

Your not going to find one that fits your dimensions perfectly but you will find one or more that will fit inside that space. This one measures 2.2 x 1.6 x 3.8. That is about as close as it gets. Its a 12V battery offering 1.3 Ah. All it takes is a simple web search with 'small SLA batteries'. I did the search on google then when to the shopping side. It was the 9th one down on the list. If that Amazon price is too much then take your pick of one of these. 

[mpilchfamily]

BTW 1.3Ah is about as good as it will get with that size of battery. If you want longer run times then you need a larger battery or a larger container that can hold a pair of those batteries in parallel.

[rickharris]

+1