Slow charging Garmin Xero C1

[Fire Dog]

Lately I have noticed that it is taking longer and longer to fully charge up my Garmin chronograph.
Now been on charge for two days and only 99%..!
Has anyone else noticed this problem?
It is about 2 years old but I would think that considering the cost the battery should last longer and recharge quicker than is now the case.

 

[Krogen]

Have you ever completely discharged the battery? Battery "gas gauges" need to be reset now and then. They typically count coulombs to make a guess at the state of charge. To do it with reasonable accuracy, they need to know where fully discharged and fully charged are. That's why it may be showing 99% but be fully charged. Try running it all the way to empty and then charge it all the way up without disconnecting it from the charger. Before anybody calls me a fool, I'm a power conversion engineer. Trust me. This is how most battery "gas gauges" work.

 

[Big_Daddy]

....... Before anybody calls me a fool, I'm a power conversion engineer. Trust me. This is how most battery "gas gauges" work.

Now come on Krogen.......no one on here would ever argue or resort to name calling.

 

[Tommie]

coulombs

Sounds like a nonsense word. Just shows what a dummy I am. Far as I’m concerned, electricity is magic pixie dust.

 

[Bottom Fodder]

Rechargeable batteries can develop a memory, they need to be cycled low every so often and not be “toped off” every timed their used

 

[Bottom Fodder]

Sounds like a nonsense word. Just shows what a dummy I am. Far as I’m concerned, electricity is magic pixie dust.

If you knew the resistance of you barrel on the bullet times the time it took to travel the length of the barrel you could say my gun shoots x# of Coulombs. Now that would impress someone.. lol

 

[Fire Dog]

Many thanks to all who have quickly replied, in the meantime I contacted my computer building son to get his advice as well as perhaps needing a battery replacement and he put me onto a 1,100ma replacement over the stock Garmin 820ma.
For less than $20 it should arrive mid month though in the meantime I will see what fully discharging the unit before chartering again will do…
I had used different USB chargers as well as trying different charging cords, nothing seemed to make a difference.
He has now also suggested that I clean the port with alcohol or contact cleaner and that is the next project I will try…
Up until this last time trying to charge the darn thing all had been sweet but two days of trying to charge compared to Garmin saying four hours is a bit much…!

 

[Krogen]

Rechargeable batteries can develop a memory, they need to be cycled low every so often and not be “toped off” every timed their used

You can't generalize. Old-school NiCd batteries did develop a memory. Not so with other chemistries like Nickel Metal Hydride or Lithium Ion. The Garmin has a Li Ion battery and doesn't exhibit that phenomenon. It can be fully charge and fully discharged. Maximum battery life occurs if you charge to 80% and discharge to 20%, but 100% to 0% is fine. Contrary to popular misconception, there's no problem at all leaving a Li Ion battery on a charger indefinitely. It's the charge/discharge cycling that wears one out.

 

[Ranger188]

You can't generalize. Old-school NiCd batteries did develop a memory. Not so with other chemistries like Nickel Metal Hydride or Lithium Ion. The Garmin has a Li Ion battery and doesn't exhibit that phenomenon. It can be fully charge and fully discharged. Maximum battery life occurs if you charge to 80% and discharge to 20%, but 100% to 0% is fine. Contrary to popular misconception, there's no problem at all leaving a Li Ion battery on a charger indefinitely. It's the charge/discharge cycling that wears one out.

This ^^^^^^

 

[old_heli_logger]

Those pesky dendrites

 

[kelbro]

Another thing that can harm or kill lithium batteries is for them to dwell for a long time in freezing or extremely hot temps when they are fully discharged.

It's best to keep lithiums at least half-charged or topped off.

 

[Tommie]

Many thanks to all who have quickly replied, in the meantime I contacted my computer building son to get his advice as well as perhaps needing a battery replacement and he put me onto a 1,100ma replacement over the stock Garmin 820ma.
For less than $20 it should arrive mid month though in the meantime I will see what fully discharging the unit before chartering again will do…
I had used different USB chargers as well as trying different charging cords, nothing seemed to make a difference.
He has now also suggested that I clean the port with alcohol or contact cleaner and that is the next project I will try…
Up until this last time trying to charge the darn thing all had been sweet but two days of trying to charge compared to Garmin saying four hours is a bit much…!

Good information. Keep us posted on that replacement battery.

 

[kelbro]

I would suggest calling Garmin to see if they might warranty it. They are pretty good with things like this if it's a known issue.

An aftermarket battery may or may not have the safety protections that the Garmin OEM batteries have. It would most likely negate any factory warranty.

 

[Bojo]

Are you using the factory supplied cord ?

Different devices will charge at a different rate when using a different cord than was supplied your device.

This may not affect all devices but it sure does for some.

As well as what amp output ?

walwart/110 adapter or 12 volt cigarette lighter.

 

[divingin]

Rechargeable batteries can develop a memory, they need to be cycled low every so often and not be “toped off” every timed their used

Was true of NiCads. Not so much with NiMH or lithium chemistries. NiCads had memory; NiMH had a cycle life and a fairly high self-discharge rate, and Lithium (the original lithium cells - I don't know about Lithium Polymer, which is the current flavor of lithium) had a finite shelf life (meaning they degraded whether used or not.)