7.2V, 2.5Ah, 40W
7.2V, 2.9Ah, 21Wh
7.2V, 3.4Ah, 24Wh

nb2037 Specification Summary

Part numbers:

NB3037HD25 - 2.5Ah Hi Power
NB2037HD29 - 2.9Ah Low Temp
NB2037HD34 - 3.4Ah Hi Capacity

chemistry / cell array:

2 Li-Ion 18650 cells / 2S1P array

capacity / energy:

2.5Ah / 40W
2.9Ah / 21Wh
3.4Ah / 24Wh


Vmax=8.4V Vnom=7.2 V Vcutoff=4.8V

eq. li content:


max continuous discharge

NB3037HD25 - 8A
NB2037HD29 - 3A
NB2037HD34 - 3A

max cont discharge to cutoff voltage

NB3037HD25 - 40W
NB2037HD29 - 14.4W
NB2037HD34 - 14.4W


Fully SMBus Rev 1.1 Compliant

data system:

Fully SBDS rev 1.1 compliant


"CH" range desktop charger or other SMBus Level 3 compliant charger (LT 4100 recommended).

physical dimensions:

HEIGHT: 0.9" / 23mm
LENGTH: 3.4" / 87mm
WIDTH: 1.7" / 42.4mm
WEIGHT: 122g / 4.2oz

mating connector:

rec. battery cavity:

24 x 43mm cross-section.
Battery centered within the cavity.

nb2037 Description

The NB2037 is designed & built in the USA by Inspired Energy, Inc. You can buy any quantity from a single battery up to many thousands, all direct & built-to-order from Inspired Energy.

The NB2037HD29 can be used in low temperature applications to provide improved (not full) performance to -20°C. Cell capacity will be reduced, as will the ability to deliver high currents - especially current spikes. Also fuel gauge accuracy & thermal measurement will still decline with decreasing temperature. For these reasons, the only way to assure yourself that the battery performs in your particular application to your satisfaction will be to perform exhaustive low temperature application testing under all anticipated environmental and operational conditions.

With 8A discharge capability, the NB3037HD25 is ideally suited as a "hot-swap" battery to hold up the device for a short period while the main battery is changed.

The NB2037 smart Li ion battery can be customized to meet your needs. Maybe a label change to your corporate livery? Or a firmware modification to modify the smart battery data to suit your needs? Or perhaps you need the performance of the NB2037 changing. Creating custom-hybrids of standard batteries is a part of Inspired Energy's established expertise.

Inspired Energy manufacturers all products to order. We sell direct to clients globally in quantities from 1 to  >50,000. We accept Credit cards for small orders & samples.

If you are interested in purchasing a standard battery pack, or receiving a quotation please contact us at:
US Toll Free: 1-888-5-INSPIRE (1-888-546-7747) or USA 352 472 4855
or use the current email address shown on our contacts page.