Custom 25.2V 15Ah 21700 Battery Pack

A 25.2V 15Ah lithium-ion pack built for OEM integration. It carries 378 Wh of usable energy and delivers 10A continuous, a 0.67C rating suited to mixed duty: sustained running with periodic higher demand.

Charging at 5A brings it to full in roughly 3.5 hours. The operating window is -20~60°C on discharge and 0~45°C on charge. The pack measures 550 x 75 x 30 mm and weighs 3 kg.

Where it sits in the range

This is the largest 25.2V build we list as standard. Below it sits the 10Ah configuration; above it we move to a bespoke design rather than a catalogue starting point.

What we customise

Capacity, enclosure, terminals and discharge rating are all drawn to the application rather than picked from a list. Communication over CAN and RS485 is standard and Bluetooth covers local monitoring; WiFi or 4G with cloud software is available on request.

Common questions

Can you change the discharge rating?
Yes. Rate is set by cell selection and pack design, so tell us the peak current you need.

Can you build to our enclosure drawing?
Yes. Send the drawing and we design the pack around it.

Cells, compliance and lead time

Grade A 21700 cylindrical ternary cells, generally specified with UL recognition at cell level. Every pack ships with a UN38.3 test summary and MSDS prepared for air, sea and road transport. Assembly and testing take around 7 working days. Cell supply is what sets the overall schedule: when the cells your design needs are in stock, samples ship in 12–15 working days; when they have to be sourced, allow 20–25. Tell us your target date early and we will confirm cell availability before you commit to it. Production runs 30–35 working days. There is no minimum order quantity — this is a custom design business and we quote single units, with pricing improving noticeably from 100 packs upward. Ternary lithium warranty typically runs 2 years.