well, it has lasted most of winter.... so, job done
a few more days and it will still be light at 10pm here so I won't be needing a light. It cost pennies, and has served me very well. If it packs up, I will just buy another next year, but I won't be paying hundreds of pounds though, and most probably will buy another Solar Storm
back light is a different story though.... I opted for a Cygolite Hotshot which I'm very happy with ... I looked at the Dinotte but was not prepared to pay the high price as the Cygolite Hotshot does the job fine. That with a Proviz Reflect 360 Hi-Viz jacket is all that is needed IMHO
Point here is that it isn't what it's claimed to be. You can't compare this Solarstorm light to the Lupine lights that are noted for accurate specifications, high reliability and safety. All of those things cost money. What you bought is not a 5000 lumen light for 20 pounds.
I would also be concerned about the relative safety of their battery packs. There are other brand name cheap lots that don't have that sort of a reputation. Do note too, that Magicshine - one of the first Chinese lights - put a US online retailer/distributor (Geoman) out of business over safety issues with batteries that caught fire. Magic shine then pulled back to Chinese protection and forced the retailer to do the safety recall, which put them out of business.
J.