ND2057 / ND3057


12-Cell (4s3p / 3s4p)

Datasheets & User Notes:

(Note: The ND2057HD24, HD29,  and HD31 are old models. Red
links coming soon)

ND2057HD24 Datasheet

ND2057HD29 Datasheet

ND2057HD31 Datasheet

ND2057HD34 Datasheet

ND2057QE34 Datasheet

ND3057HD25 Datasheet

Smart Battery User Notes


Product Pic
PART NUMBERS: ND3057HD25 – 2,5Ah Lo R e cells, Lo Temp / Hi Current
ND2057HD34 – 3.4Ah cells, Hi Capacity
CHEMISTRY / CELL ARRAY: 4 Li-Ion 18650 cells / 2S2P array
CAPACITY / ENERGY:  ND3057HD25 – 5.0Ah / 29Wh
ND2057HD34 – 6.8Ah / 49Wh
VOLTAGE:  V max =8.4V V nom =7.2V V cutoff =4.8V  

ND3057HD25 – 10A / 48W

ND2057HD34 – 8A / 40W

COMMUNICATIONS: Fully SMBus rev 1.1 Compliant
DATA SYSTEM:  Fully SBDS rev 1.1 Compliant
CHARGING: Any Inspired Energy CHxxxx charger or Level 2/3 SMBus Charger.
The Linear Tech LT4100 chip is recommended.
LENGTH: 3.4″ / 86.4mm,
WIDTH: 3.1″ / 78.7mm,
WEIGHT: 234g / 8.3oz
MATING CONNECTOR: Std. 5-position, 5mm centerline. Mating Conn. list
FUEL GAUGE: Integrated “Always-on” 5-bar LCD fuel gauge on the end opposite the connector.
RECOMMENDED BATTERY CAVITY: 23.5mm x 80mm cross section. The battery should be centered within this cavity.


National Stock Number/NATO Stock Number: ND2057HD29 NSN: 6140015994701

The ND2057 and ND3057 are ideal for low temperature applications as the low internal impedance enables the cells to deliver good capacity and discharge current.  The ND2057 can preforms as low as -10°C and the ND3057 has tested as low as -30°C (Note, in cases of low temperature applications, we strongly recommend all batteries be tested in the intended environment to discern specific performance levels). Also, with their 8A discharge capability, the ND2057 and ND3057 are ideally suited as a small “hot-swap” battery to hold up the device for a short period while the main battery is changed.

The ND2057 and ND3057 smart Li ion batteries can be customized to meet unique specifications. Maybe you’re looking for a label change to display your corporate livery? Or a firmware modification to the smart battery’s data? Or perhaps you need a performance change for the batteries? Creating custom-hybrids of standard batteries is a part of Inspired Energy’s established expertise.

Ready to buy?

The ND2057 and ND3057 are designed and built in the USA by Inspired Energy, Inc.
Inspired Energy manufactures all products to order, and 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 our products, 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 contact us page.

Inspired Energy, LLC

25440 NW 8th Place, Newberry, FL 32669 USA

P: 352-472-4855

Toll Free: 888-546-7747

P-Series batteries use a high-current, 7-pin D-sub connector. They are more rugged than the N-Series batteries - some of them are IP65-rated - they also are optimized for using cells with low internal impedance which excel in low temperature and high discharge current applications. They require the use of a "PH" series charger.
N-Series batteries use a 5-blade standard battery connector. They are optimized for using high capacity cells for maximum runtime. They require the use of a "CH" series charger.