How can I reduce battery weight?

Use higher energy density cells, optimize series/parallel count, minimize unnecessary casing mass, and choose efficient BMS and pack architecture.

18650 vs 21700: which is better?

21700 cells often provide higher energy and better current handling per cell, while 18650 remains widely available and proven. The best choice depends on your design goals.

Battery Pack Weight Calculator

Q: What is battery pack weight?

Battery pack weight is the total mass of all battery cells plus structural and electrical overhead such as BMS, holders, and wiring.

Build Inputs

Quick Presets

Cell Type ?

Weight per Cell (g) ?

Display Unit ?

Series (S) ?

Parallel (P) ?

Or Total Cells ?

Overhead Mode ?

Overhead Value ?

Include holder (about 2%) Show per-cell total

Cell Capacity (mAh) ?

Cell Nominal Voltage (V) ?

Target Pack Voltage (V) ?

Target Pack Capacity (Ah) ?

Cost per Cell (optional) ?

BMS Cost (optional) ?

Live Results

Saved Builds

Total Cells0

Cells Weight0 g

BMS + Overhead0 g

Total Package Weight0 g

Estimated Pack Cost-

Energy Density-

Efficiency: -

Visualization

Pack Layout Preview

Battery FAQ

What is battery pack weight?

Total battery weight includes cell mass and extra hardware such as BMS, wiring, busbars, holder structure, and casing overhead.

How to reduce battery weight?

Prioritize high energy density cells, avoid excess overhead, choose efficient configuration, and optimize mechanical design.

18650 vs 21700 comparison

21700 usually gives higher capacity per cell and fewer total cells for the same target, while 18650 can be cheaper and easier to source.