very good, you can fit good enough unprotected 18650 batteries, but not 18650 protected!

very good, you can fit good enough unprotected 18650 batteries, but not 18650 protected!

very good, you can fit good enough unprotected 18650 batteries, but not 18650 protected!

Must be careful with orientation of cells this holder can accept both in series or parallel. Your device might not be able to handle 7.4v (series). Sufficiently thick walls. The wires even come pre-tinned. Nice touch.

Must be careful with orientation of cells this holder can accept both in series or parallel. Your device might not be able to handle 7.4v (series). Sufficiently thick walls. The wires even come pre-tinned. Nice touch.

Must be careful with orientation of cells this holder can accept both in series or parallel. Your device might not be able to handle 7.4v (series). Sufficiently thick walls. The wires even come pre-tinned. Nice touch.