Applicable battery: flat head 18650 lithium batteries length: 6.5cm/2.56in, pointed head 18650 lithium batteries length: 6.7cm/2.64in, pointed head+protective plate 18650 lithium batteries length 6.9cm/2.72in (excluding battery).
This product would be ideal for individuals who need a simple and inexpensive mobile power charging box, without relying on proprietary batteries or additional software.
