The Remora tracking unit uses 4 x “C” cell batteries. The circuitry is designed to handle battery cell voltages from 1.5V to 3.6V. This allows the Remora to operate off a range of primary cells including low cost Alkaline batteries and top of the range Lithium-Thionyl-Chloride batteries for longer battery life and operations in extreme temperatures. 


Consumer Alkaline Batteries

In field testing some of the brands of ‘consumer’ alkaline batteries have found to have a failure rate of between 2% and 3%.

In our experience this has been observed as a single cell failure after a few weeks in operation, and is observed by a sudden drop in the reported open circuit voltage. When analysing the batteries typically one of the cells has failed and shows a zero voltage when measured on a voltmeter.


Recommendations

Industrial

We recommend that partners and installers use the best quality batteries possible and if using alkaline batteries source Industrial specification alkaline batteries from a recognised supplier. 


Fresh

It has been shown that batteries deteriorate over time.

Make sure that the batteries that you are buying are as fresh as possible. You can usually check the batch manufacture date or the expiry date on the battery to get an idea. 


Test

Ideally each battery should be tested using a battery tester before being installed.


Suggested Industrial Alkaline Batteries:

  • Panasonic LR14XW Industrial type


Suggested Lithium Thionyl Chloride (LTC) Batteries:

  • SAFT LSH14 – for extreme temperatures and high capacity, can be expensive
  • TITUS 2ER26500SC - a double pack containing 2 x C cells and a special cap to fit the Remora at a more reasonable price. Contact your local Digital Matter office for pricing and availability.


A note about LTCs in the Remora

Not all LTC batteries are the same size. Some may be slightly too short or long for the Remora battery holder, ensure that you check the fit before ordering significant quantities!


Digital Matter supplies LTC batteries - sourced from TITUS. These are made with a special cap to fit inside the Remora Battery Holder - as in the attached image.  


Pulse Current

Not all LTC batteries are built the same - in general, go for Spiral Type batteries. 

The batteries need to have a high enough rating for pulse current to meet the following peaks:


Device    
Battery Type
Peak Current (approx)
Remora 2G
LTC
900mA
Remora 2G    
Alkaline
1700mA
Remora 3G
LTC
200mA
Remora 3G
Alkaline
400mA


Test your batteries, and ensure to leave some room with the specified pulse current - they do not always perform as well as the data sheet may suggest!