Many people have bought and use RC model LiFePO batteries from Hobbyking. I have two, a 4S1P 4200mAh and a 4S2P 4200mAh pack.
I was wondering who else is supplying LiFePO as I could find no RC shops in the UK who had anything in stock when much Googling turned a German company, Eremit, who supply various LiFePO batteries. What caught my eye was a 12.8V 4000mAh pack made from 8x 18650 sized cells complete with an integrate BMS for approx €37 plus shipping.
I was in email conversation with Ed DD5LP and asked him if he would find out if Eremit would be able to mail to the UK with problems of supplying Lithium batteries in general and with the problems regarding VAT since EU VAT rules changed and Brexit. There was some mention of them supplying an Austrian company for general distribution. Ed was impressed enough with the spec that he ordered 2, one for himself and one for me to collect from him at FN, which was very good of him. Duly paid for, collected and now at home in Scotland, getting through security at Geneva airport without issue.
Ed has tried his and is very happy. I spoke to at least 2 people at the FN rally who have the same pack and are very pleased with their purchases. I’ll fit a plug to mine and try it on the next activations. Not this weekend however as it’s VHF Field Day.