I bought this module "Circuit Board Module DIY Power Bank New” from the ebay seller "jpsurfshop" <br /><a href="https://www.ebay.co.uk/itm/333551522436" target="_blank" rel="nofollow">https://www.ebay.co.uk/itm/333551522436</a><br /><br />Whether it is "new" is debatable but it works very well, has thermal protection for the batteries and does support charging while running, but unfortunately it does not stay on after you stop charging, which is the feature I was hoping for.<br />...<br /><a href="https://www.youtube.com/watch?v=lyIA4Bs_nX8" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=lyIA4Bs_nX8</a>