ok
before anyone goes mad with this
these battery's are not STABLE unless you charge them correctly
they have caused fires and I will post pics when I get back home tomorrow
there are better system for using solar charging / power for the Gridseeds
don't get me wrong this WILL work but you must very careful.
just look at this on youtube
http://www.youtube.com/watch?v=ixIOEPnsgbIFirst of all, the Youtube video is not LFP batteries, it's LiPo, LFP is much safer than LiPo.
Secondly, SunSeed has over-charge, over-discharge protection for the battery and is definitely safer than what you think.
Think about the mobile phone you carry every day, if you think Lithium battery is unsafe at all, every one shouldn't be using mobile phone.