NEO-8M battery

What kind of gps battery can I use for uBlox NEO-M8N GPS module?

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What kind of gps battery can I use for uBlox NEO-M8N GPS module? Would you please recommend gps battery? and Which can I use 5.5mAh or 11mAh?For example;

  1. MS621FE-FL11E – BATTERY LITTIUM 3V 5.5MAH (https://ozdisan.com/bataryalar/sarj-edilebilir-piller/lityum-piller/MS621FE-FL11E)
  2. Seiko MS920SE-FL27E Lithium ion Şarjlı Pil / 3.0V 11 Mah (https://birikimpilleri.net/endustriyel-piller/lithium-ion-buton/920/prd-seiko-ms920se-fl27e-lithium-pil)

If you know better please recommend to me..thanksvoltagebatteriescurrentgpschargeShareCiteEditFollowFlagasked 7 hours agohasan mert karabacak111 bronze badge New contributor

  • what does the uBlox NEO-M8N GPS module require? – jsotola 5 hours ago
  • there is really not such a thing as a GPS battery – jsotola 5 hours ago
  • GPS actually uses a lot of power. Tiny batteries like that will not last very long. Maybe 30 minutes or something. One hour. – mkeith 5 hours ago
  • There are two kinds of batteries, one for powering the module, another to keep config and GPS data. – tlfong01 3 hours ago   
  • 1@tlfong01 oh, so it can maintain the ephemeris and avoid cold start? That seems pretty smart. – mkeith 1 hour ago
  • @mkeith, Ha yes, let me write up an answer and show you the photos later. Stay tuned. Cheers. – tlfong01 1 hour ago   

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2 Answers


4.2 Table 11 ought to imply how short a 5mAh battery will last at 25 to 32 mA @ 3V Perhaps bigger is better. e.g. 3000mAh secondary with CMOS LDO

https://www.u-blox.com/sites/default/files/NEO-M8-FW3_DataSheet_UBX-15031086.pdfShareCiteEditFollowFlaganswered 5 hours agoTony Stewart Sunnyskyguy EE75106k22 gold badges3737 silver badges146146 bronze badgesAdd a comment0


What kind of power source should I use for the uBlox NEO-M8N GPS module?


  1. uBlox NEO-6/7/8M GPS Module has a small button battery on board to hold the config/fix data.
  2. You need an external power source for the module.

Neo-6/7/8M GPS Module Setup Example 1

I am using bench top 220VAC to 12VDC and a LM2956 12VDC to 5VDC step down 2A PSU to power the GPS module. I also tried Lipo 18650 batteries but found them not necessary to improve any performance.

The GPS module has a small on board button battery at the top left corner of the module.

gps battery

Neo-6/7/8M GPS Module Setup Example 2

The photo shows the small button battery at the bottom left corner.

neo battery

See the reference below for more details

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(1) Rpi Neo-6M / Neo-8M GPS Module Setup / Fix / Update Problems

(2) How can Rpi listen to a GPS module? – RpiSE 2020jun02

(3) GPS taking long time to fix out in the open – EESE 2020sep03

/ to continue, …


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