&gt;wouldn&#x27;t it be simpler and safer to replace the cells<p>Dunno about safe but I&#x27;ve bought maybe 5 unofficial replacement li ion batteries for thinkpads, 2 for the iphone and will probably get one for my macbook. It takes about 1 min - go on ebay click buy, arrives in the post. It&#x27;s hard to get much simpler than that until this recent lock down stuff. I&#x27;ve had no problems except the cheap knock offs don&#x27;t generally last quite as long as the originals did when new.