The Molicel P42A is king when it comes to 21700 battery options in the esk8 community. This is the cell of choice by any reputable battery builder’s standards when it comes to 21700 options.
If you’re keen to build your own electric skateboard battery pack, the Molicel P42A’s are a powerhouse of a choice. They offer fantastic capacity, and ground-breaking discharge ratings.
Style: Flat Top
Nominal Capacity: 4200mAh
Continuous Discharge Rating: 35A (45A Peak)
Nominal Voltage: 3.6v
Approximate Dimensions: 21.40mm x 70.00mm
Approximate Weight: 67.8g
Never completely discharge Li-ion battery (below 2.5V under load ).
Charge fully to 4.2V before first use.
Never use force to install (insert) Li-ion battery.
Do not use old and new battery cells together.
Use only a high quality battery charger.
Do not expose to heat.
Do not short (connect) positive (top), and negative (bottom) battery terminals (contacts). Keep battery that is not in use in plastic holder (or any insulating container).
Never charge battery over 4.25V (another reason to use high quality battery charger).
Do not charge unattended unless using an intelligent charger that shuts off at full charge.
Do not store your Li-ion batteries fully charged (for extended period of time).
Store in cold and dry place at approximately 3.7V (storage charge).
After battery is discharged don’t leave it discharged, charge it as soon as possible.