SKU: 80616978392

NASA Battery Monitor Clipper BM-2 12VDC

Sale price$121.50 Regular price$135.00
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Description

NASA Battery Monitor Clipper BM-2 12VDCFeatures Specifications Supply voltage 8 16 Volts DC Supply current 1. 5 milliamps Battery capacities 5 999 AMP Hour Load current 199 AMPS Maximum Charge current 199 AMPS Maximum Shunt Standard 50 millivolt @ 200 AMP Cables supplied: 200 AMP shunt link to M8 Ring terminal. 5 Metre from display unit to battery fused and fitted with ring terminals for shunt fuse holder and M8 ring terminal to battery. Display unit Standard 110mm square Clipper case.

Features

Specifications

  • Supply voltage 8 - 16 Volts DC
  • Supply current 1.5 milliamps
  • Battery capacities 5 - 999 AMP Hour
  • Load current 199 AMPS Maximum
  • Charge current 199 AMPS Maximum
  • Shunt Standard 50 millivolt @ 200 AMP

Cables supplied:

  • 200 AMP shunt link to M8 Ring terminal.
  • 5 Metre from display unit to battery - fused and fitted with ring terminals for shunt fuse holder and M8 ring terminal to battery.

Display unit

  • Standard 110mm square Clipper case. High contrast LCD backlit for night viewing.
  • Minimum voltage visual alarm
  • Simple operation - 4 keys to select backlight Volt/Amp/State of Charge screen
  • AMP hours or Time to run.

How does it work? The minimum information required to monitor the state of charge of a battery is the terminal voltage and the charge/discharge current **. The BM2 measures both these parameters and computes the state of charge using a complex well proven algorithm. A simple and intuitive display shows the service battery voltage charge/discharge current state of charge and time to charge/discharge. The instrument also warns the user when the charge level is too low so that load can be shed or charging commenced to protect the battery. A resettable Amp Hour counter is provided for checking the efficiency of the charging system or keeping a track of power consumption and a second input lets the user monitor the voltage of the starter batter. The simple display format does not mean the internal software is unsophisticated. In fact two separate algorithms are used. One based on integrating amp hours over the charge and discharge cycle the second based on an adaptive internal mathematical battery model.

A unique feature of the BM2 is its ability to use information from both algorithms during the charge/discharge cycles to continually update its performance. This means that unlike many other systems that rely solely on amp hour integration the NASA Marine BM2 never needs to be re-synchronised with the battery. The algorithm includes Peukert's equation to ensure accuracy over a wide range of load currents. The BM2 does all this whist consuming a meagre one and a half milliamps. It is a true battery monitor easy to install and excellent value for money.

** Some say that they can calculate the state of charge from the terminal voltage only but as we all know the terminal voltage falls when the battery is under load and rises when under charge. This fall and rise can be quite substantial especially when a heavy current is flowing so how can the terminal voltage be used to calculate anything without knowledge of the magnitude of the current involved?.

In The Box

Display; 200 AMP shunt link to M8 Ring terminal; 5 m cable.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 80616978392

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Coco
Bozeman, US
★★★★★ 5
Nice little jewelry box
Color: Cloud White, Material Type: Paper, PU
Just what I wanted in size and available compartments. The only thing I am hesitant about is the paper outside. Mine is white and may get dirty quickly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
J
Verified Purchase
James
Belleville, US
★★★★★ 5
A Lovely and Useful Gift
Color: Cloud White, Material Type: Paper, PU
I bought this SONGMICS jewelry organizer box as a gift and it was a great choice. The design is beautiful and it keeps jewelry well organized. It’s compact and perfect for travel or everyday use. The person I gave it to loved it and uses it all the time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
J
Verified Purchase
Jeimy Aguilar
Alexandria, US
★★★★★ 5
Small and cute!
Color: Cloud White, Material Type: Paper, PU
Its perfect!
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Reviewed in the United States on May 25, 2026
R
Verified Purchase
Robin
Port Orchard, US
★★★★★ 5
Great jewelry box for travel
Color: Cloud White, Size: 8"W
Great jewelry box for travel. Especially if you like to take a lot of jewelry to use with your outfits. It's small enough to not take up a lot of room buttholes a good amount of jewelry.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
T
Verified Purchase
Tech
Lake Worth, US
★★★★★ 5
Great product, roomy, well made
Color: Cloud White, Size: 8"W
Love this! Bought a second one. It is sturdy with a lot of protection in the hard case. I expected the case to be soft, but as I think of it, I am happy that it is hard shelled on the outside in order to protect the items inside. The case also has tons of room. I will keep my most-used jewelry packed in it and just grab this case when I travel. Prior to ordering this, I ordered another brand and I am SO happy that I returned that one. It was flimsy, cheaply made and not functional. This is great - looks expensive, well made, velvet lined, plenty of room. This is a bit on the larger side, but completely functional to put into a suitcase. It is organized well, too. My only suggestion for the makers is that the inside dividers could be secured better (they move around a bit) and if they wanted to hit it out of the park, they could actually offer additional dividers for that section (since the sections are fairly large, they could be divided further). However, all in all, this is a great travel organizer and a good value!
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Reviewed in the United States on April 15, 2025

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