Honestly I was looking forward to having 10+ hour of non stop full body. Then when my package arrived it turns out it was faulty. 2 of my custom L cables don't actually charge my trackers when connected to the trackstrap battery. I've used other cables and they work fine. So looks like I have to buy a few new cables to use instead of the supplied ones. Honestly disappointed. Make me pay $50 extra for battery packs and don't even give me working cables.