DIY 200Ah LiFePO4 battery < $900

theoldwizard1 wrote:
First watch this video Lithium Iron Phosphate (LiFePO4) 120Ah Grade A Cell Capacity Testing!

The same company, BLS Battery Industries Limited, that sell those 120Ah cells also sells 200Ah cell ! Build a 12V 200Ah pack WITH BMS for about $800 !!!!

Thanks Wizard for posting this.
The idea of building your own batteries is very attractive for those with the knowledge and skill to do so. To be able to customize and maximize a battery bank to fix your rig would be great.
However...... It has to be said that this is a sponsored video. Basically a paid ad. He does state at the beginning that the company "reached out to him" for him to test these. As well, he's making money off the link to purchase in the video's description. I think it would be reasonable to assume the company didn't just pull a battery off the shelf and ship it out. They'd have had one that was carefully made to meet, or in this case exceed spec's. So, IMO, this is an infomercial without the over caffeinated presenter or the professional actor wearing a lab coat.
If you've got the money to burn, have at it. But seems a steep risk considering the potential for real world failure, a difficult to claim warranty (if there is one), and the risk of burning down your rather large investment. Not to mention possibly your house/garage or family. Or even the possible risk of your insurance company not covering your loss.
Just food for thought.