GPSrChive Discussion Forum

I have set expedition mode to OFF

In the last months, i turned off the unit, and when i turned it on some days later - battery is emty.

I had this for 4 times, and i am sure, i turned off the unit.

Does anyone else observe this strange behaviour. - battery drains if powered off - but it is not every time.


The first times, i believed, i had forgotten to turn it off - but now, i am rather sure, to have it switched off.

Current firmware version?

Any observations as to reported battery charge level when turned off vs how long the unit was powered off?

Also, which batteries are you using?

I have never seen this behaviour with my 66st but when I was experiencing short battery (not discharged batteries) life it was because the batteries were approaching the end of their life (Black Panesonic Eneloop - 2500mAh) after a couple of years.

Three more questions for you:
- how old are the batteries?
- how are you charging them (in the device or with a charger - which model)?
- have you used a smart charger to check on the battery capacity and charge status?

Loader external: AV4
The best loader - i know
Batteriy- ENELOOP PRO

I can do internal gpsmap 66 loading - but it takes a very long time and eneloop ist no really full afterwards
Only external AV4 gives full capacity

I will measure the eneloops, if they are to old

It was with different previous firmwares.
7.60 is installed only since a few days.

Yes, a quick and simple test would be to test with a brand new set of batteries.

I use Ladda 2450 from IKEA which are over one year old.
Was out over the weekend with the 66 and ran the it for 3 hours each day and still show a full charge.
Now back home and the batteries is still good to go.....
Plus It has been off for over 1 1/2 weeks before I took it out to use over the weekend.

It is hard t say how one has their 66 setup for the batteries to drain so quick.......

The only one setting i can think of that drains batteries is if pressure readings should be saved even while the unit is off.
This setting is found under:
Setup - Altimeter - Pressure trending.
If Save Always is selected the unit will use batteries even while powered off. I guess it will work similar as expetition mode, but only for pressure.

The Alarm is another setting which, when set, will also run while the device is powered down. It might be worth checking that any Alarm is turned off, since when it turns the GPSr on, the device stays on.

Thanks for feedback
Alarm is off
Pressure trending is not set to always

Eneloops are tested and in perfect condition

I will observe it.

As I reported back on Jul 14, 2021.
Last weekend was the first time the wife and I want for a couple of days hiking.
I had not charged my 66 since last reporting. After the first day of hiking all day the 66 showed 50% battery left.
So seeing we would be out for the next 3 days hiking all day I recharged the batteries.
I just checked as we are back home and the 66 shows still full charged.
So the user with the battery problems has not reported back it is hard to say what his problem really was.