Lithium Ion

Power Range

PG3665 25.2V, 2.9Ah, 73Wh

PH2059 28.8V, 3.4Ah, 98Wh, 80W

PH2054 14.4V, 6.8Ah, 98Wh, 80W

PH3059 28.8V, 2.5Ah, 72Wh, 240W

PH3054 14.4V, 5.0Ah 72Wh, 200W

Thinline Range

NC2560 10.8V, 2.0Ah, 22Wh

201x Range

ND2017 7.2V, 5.8Ah, 41Wh

202x Range

NI2020 10.8V, 8.7Ah, 94Wh   

NL2020 10.8V, 8.8Ah, 97Wh

NL2024 14.4V, 6.6Ah, 97Wh

203x Range

NB2037 7.2V, 3.4Ah, 24Wh

ND2037 7.2V, 6.8Ah, 49Wh

ND2034 14.4V, 3.4Ah, 49Wh

NF2030 10.8V, 6.8Ah, 73Wh

NH2034 14.4V, 6.8Ah, 98Wh

204x Range

NC2040 10.8V, 3.4Ah, 37Wh

NF2047 7.2V, 10.2Ah, 73Wh

NF2040 10.8V, 6.8Ah, 73Wh

NI2040 10.8V, 8.7Ah, 94Wh

NL2044 14.4V 6.6Ah, 97Wh

205x Range

ND2053 3.6V, 9.6Ah, 35Wh

ND2057 7.2V, 6.8Ah, 49Wh

ND2054 14.4V, 3.4Ah, 49Wh

NH2057 7.2V, 13.6Ah, 98Wh

NH2054 14.4V, 6.8Ah, 98Wh

NL2050 10.8V, 8.8Ah, 97Wh

NL2054 14.4V, 6.6Ah, 97Wh


Nickel Metal Hydride

NJ1020 12V, 3.85Ah

NI1030 10.8V, 3.85Ah


Desktop Chargers

Single Bay chargers

CH4000 1-bay quick charger

CH5000 1-bay quick charger + calibrator 

CH7000 1-bay solar/vehicle/AC charger

Dual Bay Chargers

CH4040 2-bay quick charger

CH5050 2-bay quick charger + calibrator

Multi Bay Chargers

4 & 6-bay Smart Charging Systems

12-Bay, Rack-mount Smart Charging Systems

"P" Series battery Chargers

PH4000 1-bay charger for "P-Series" batteries



For 202x range batteries

Without Charger

With integrated charger &/or regulated DC output

For 204x range batteries

With or without integrated charger

For 205x range batteries

For 4-cell ND205x batteries

For 8-cell NH205x Batteries



Battery & Charger parts etc..


Smart Battery Test Systems

ATA004 USB Port SMBus logger


High Energy Li Ion Battery Systems

Systems up to 6,000 Watt Hours 



Click here to learn more about the history of smart standard batteries and the role played by the Inspired Energy team and their smart, standard battery products.


7.2V, 2.5Ah, 40W

7.2V, 2.9Ah, 21Wh

7.2V, 3.4Ah, 24Wh

NB2037 Smart Li Ion Battery Specification Summary 

Part Numbers


2.5Ah Hi Power
NB2037HD29 2.9Ah Low Temp
NB2037HD34 3.4Ah Hi Capacity
Chemistry / Cell Array

 Two Lithium Ion 18650 cells in a 2S1P array

Voltage (Click to see graph)  Vmax=8.4V     Vnom=7.2 V     Vcutoff=4.8V
Equivalent Lithium Content 2g
Max continuous discharge current


NB2037HD29 3A
NB2037HD34 3A

Max continuous discharge power

(to cutoff voltage)


NB2037HD29 14.4W
NB2037HD34 14.4W
Weight   122g / 4.2oz
Communications  Fully SMBus rev 1.1 Compliant
Data System Fully SBDS rev 1.1 compliant
Charging Inspired Energy "CH" range desktop charger or other SMBus Level 3 compliant charger (Linear Tech 4100 recommended). Contact us for details of our standard open-frame charger boards
Height 0.9" / 23mm
Length 3.4" / 87mm
Width 1.7" / 42mm
Mating Connector   Click here to view compatible mating connectors. 
Recommended minimum battery cavity 24 x 43mm cross-section. Battery centered within the cavity


Click here to view accessories, spares & replacements for Inspired Energy Products


NB2037 Downloads:
NB2037HD29 Engineering Data Sheet
NB2037ZD25 Engineering Data Sheet
NB2037HD31 Engineering Data Sheet
NB2037HD34 Engineering Data Sheet
NB2037 User Notes
Contact Us for high power "ZD" or low temperature product application notes
See our shipping page for additional downloads & certifications

Testing by internationally recognized test labs

Standard product approvals are listed in the data sheets above.

Additional agency testing of these products can be arranged to meet your specific testing needs.

Please contact us for details and pricing

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 -20C. 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 NB2037ZD25 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. 

For information on how we can hot-rod your off-the-shelf NB2037 smart Li ion battery, details of volume pricing or any additional data, please contact us at: 

US Toll Free: 1-888-5-INSPIRE (1-888-546-7747) 

or USA 352 472 4855 

or e-mail  our Sales Department.

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