"We are very sorry to inform our customers that the H10 battery has been discontinued. We have collaborated with a battery company to produce this battery series, which has low sales and high technical difficulty. Therefore, considering all factors, we will not produce this battery again. However, the final batch of batteries should have a small amount of B-grade mixed in from the battery factory. Our warehouse has strengthened quality inspection and there is still a small amount of H10 inventory left. After processing these goods, production will be suspended. The highlight of this battery is its strong power, but the quality stability still needs to be improved
There will be a new 14500 battery vapcell K10 1000mAh 8A to replace the H10 in the future. The power is slightly weaker, but the price is cheaper and the quality is more stable, which can be used for various purposes. Vapcell company will continuously upgrade its products and improve its processes, committed to providing customers with better products
Customers who have purchased batteries in the past 3 months, please kindly check your H10 battery. If there is a decrease in heating voltage, please stop using this battery and apply for a replacement battery or other ways"
While it took them a bit too long to identify the problem, at least they are being honest about it. Now if the would do something that would allow people to get replacements under warranty…
OTH, I have at least 10 H10 cells and all have been fine. Other Vapcell cells that I have are good too. They come closer to meeting the advertised specifications than other major brands. So while this situation is not good, it seems to be isolated to just one of the cells that they sell.
I doubt that Convoy knew anything bout the problem when they shipped the bad cells
FWIW
Talk to Simon and/or Vapcell. Hopefully you can get the bad cell replaced with a good one.