Under £11. Seems like it will do the same as the power magic sort of thing.

https://www.amazon.co.uk/dp/B00020IM4O/ref=gbps_tit_m-5_7227_6d8de340?smid=A3P5ROKL5A1OLE&pf_rd_p=1011757227&pf_rd_s=merchandised-search-5&pf_rd_t=101&pf_rd_i=10157705031&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=Q11DM2E0TVRQ5G0E8Z77

 Looks interesting - I've had an EZetil coolbox in the past which was great and lasted years

 

11.3 V cut off is quite low.

11.3 V cut off is quite low.

And because its cheap who knows what the tolerances are. Some might shut off at 11.5v, some may not shut off while 11v.

 

Would be interesting to test one with a variable power supply and see what its like. You can probably take it apart and change some resistor values or something to make it cut out closer to 12V to ensure you can always start the car.

 

Its also 5amps only which is useless for something like a cool box. My small cheapo one uses more than 5amps

Edited 12 July, 201610 yr by SuperbTWM