Pick a format, chemistry and electrolyte. We size each cell, estimate its cost per watt-hour, and rank chemistries by lifetime cost of storage for your application.
Get free sample cells
We send sample cells built to your design at no charge. You pay shipping only, shown below before you enter any card details. Lithium cells travel as dangerous goods, which is most of the cost.
One-time charge. No subscription, and no further charge unless you place an order.
Samples need a free account. The configurator is open to everyone. Before we ship cells and collect shipping, we confirm your email with a one-time code.