Adi notes that some new 18650 cells are longer with added protection circuit
by Thomas from The SWLing Post on (#5K9RT)
Many thanks to SWLing Post contributor, Adi, who writes: Hi Thomas, Recently I received from AliExp two 18650 3000mAh batteries to replace the aging original XHDATA for my D-808. As you can see they are ~3mm longer than the original. They still fit, but the spring is crushed to its minimum and the cover will [...]