Source for replacement Battery

NewPower99 is certainly a great source and has great YouTube videos. They may be a bit pricier than other sources.

Some folks go to eBay and that's probably a cheaper source for usually great products.

My suggestion is to use who I've bought from in the past, BatteryShip:

https://www.batteryship.com/ and just put in nuvi 3590LMT in the Find box. Interesting, I see two batteries offered with tools and the slightly larger capacity battery is actually a tad cheaper and looks different. Batteryship includes tools and offers free shipping.

If buying from Batteryship, I'd suggest the cheaper 1250mAh battery since it corresponds to what the NewPower99 one looks like and has the same capacity.

Thanks for the info CraigW.

I do see that the 1250mAh battery for your nuvi is a special order item with a 2-3 week shipping while the 1000mAh battery is in stock today. Unless you're in a big hurry, I'd still suggest ordering the 1250 battery.

If ordering through eBay, be sure to check where the Seller is shipping from. If from China, my experience is shipping times of 4-8 weeks and maybe a 5% loss in transit experience. Also, if you need the tools, make sure your purchase is for battery plus tools.

Got mine from https://www.batteryship.com/ earlier this year for my Nuvi 760. The same CraigW suggested it on this thread: http://www.poi-factory.com/node/46110

The battery comes with tools too and it has worked fine so far.

Don't need a battery at the moment but are the Garmin units easy to open up to replace the internal battery?

With the exception of some of the oldest nuvi devices (e.g., the 3x0 and 6x0 series), it's pretty easy with the right tools. Go to YouTube and search for your model GPS plus battery replacement for a visual guide.

Jgermann has linked several in his FAQ which will give you a good idea on how to change the battery:

http://www.poi-factory.com/node/34618

Well, I ordered one from where CraigW suggested. I did order the 1250 battery, but realized it was a special order and looking at 3-4 weeks out.

I need a replacement "Now"! So I ordered one from NewPower99 and paid top dollar. But I did need it right away.

I left the other order in place since I have 2 3590's and I am sure the other 3590 will need a battery soon.

I tried charging the 3590 with the bad battery with a wall charger, but when it was completely charged, I looked at the diagnostics screen where it shows the battery "capacity". It started out at 100 and went down rapidly to 4% very shortly after I unplugged the charger form the unit.

Did you set brightness level to 100%? It sounds like you got a bad battery. Mine lasts a long time unplugged but I set mine to screen lock (dimmed).

Chewbacca.

Thanks for the reply.

The brightness level was set pretty high, either 90 or 100.

I am pretty sure the battery is going bad.

The new battery should arrive in a couple of days and I plan to change it as soon as it gets to me.

I have replaced the battery in my old 760 and it was pretty easy to do. Just go slowly and be patient. If only it was that easy to replace the battery in my phone.

Has anyone ever had a battery that lasts more than 3 years with daily use?

I think I've gotten close to 2 years once, but none of mine have ever had that great of battery life.

I just usually get the 3 year extended warranty plan on it and let bestbuy or whomever deal with replacing the battery. The last 2 times, they've said they don't want to deal with replacing the battery and just gave me a gift card to buy the then-current model.

I almost never use my 3 nuvi's on battery except for reboots after an update, etc. The original battery in my 755T was replaced when it was 6 years old, current 3 year old replacement battery is still good. My 855 refurb is 7 years old and the original battery will still operate for a couple of hours at full display brightness. My 3 year old 3597 refurb has never had more than about a 1 1/2 hour battery life (or less) at full brightness, but is still going strong.

I am retired now so my GPS only gets occasional use. But I was still working when the 755T was new and it got daily use for several years.

My nuvi 760 is 8 years old with the original battery and still going strong!

dobs108

I've had dozens of Garmin GPSr's over the years and only had to replace one battery. It was a Nuvi 760 which I bought used and suspect it wasn't cared for properly. Even my 9 year old Nuvi 265W still gives me an hours run time on the original battery.

There are some tricks to extending the life of your battery.

1. Never leave the GPS on the dash in bright sun, especially in the summer. High temperatures can drastically shorten battery life. If you must leave the unit on the dash, throw a towel or article of clothing over it.

2. When not being used for extended periods, store the unit with a partially charged battery.

3. On units having this feature, make sure the unit is turned off and not in standby mode when stored. The GPS will completely discharge the battery over time when left in standby. Storing a unit with a dead battery will also shorten it's life.

4. "Exercise" your batteries when possible. This can be difficult since most of us use vehicle power for our GPS units and rarely rely on batteries. NiCad and NiMh batteries can develop a memory effect over time if not fully discharged before recharging. Newer LIon batteries are mostly immune to this effect.

I've developed the habit of occasionally unplugging my fully charged GPS from vehicle power while driving until the low power warning appears. The time it takes for this to happen is a good indication of battery health. Be aware his can be a problem for GPS units with traffic receiver cables however. I only do this when I'm not using the traffic feature.

I've had dozens of Garmin GPSr's over the years and only had to replace one battery. It was a Nuvi 760 which I bought used and suspect it wasn't cared for properly. Even my 9 year old Nuvi 265W still gives me an hours run time on the original battery.

that's really impressive, I've never had one last more than 2 years

There are some tricks to extending the life of your battery.

1. Never leave the GPS on the dash in bright sun, especially in the summer. High temperatures can drastically shorten battery life. If you must leave the unit on the dash, throw a towel or article of clothing over it.

oops, It sits there the entire day, most of the time I'm in a garage, but not always

2. When not being used for extended periods, store the unit with a partially charged battery.

I use it on a daily basis, so not a big issue for me

3. On units having this feature, make sure the unit is turned off and not in standby mode when stored. The GPS will completely discharge the battery over time when left in standby. Storing a unit with a dead battery will also shorten it's life.

How do you do this? I think mine always goes into standby

4. "Exercise" your batteries when possible. This can be difficult since most of us use vehicle power for our GPS units and rarely rely on batteries. NiCad and NiMh batteries can develop a memory effect over time if not fully discharged before recharging. Newer LIon batteries are mostly immune to this effect.

I think I have a LIon battery in the DriveAssist 50, but I always keep it plugged in out of convenience. Thinking back to how we charge our laptops and phone and the "don't charge anything over 80% if you don't have to" rule, this makes sense for the GPS as well.

I've developed the habit of occasionally unplugging my fully charged GPS from vehicle power while driving until the low power warning appears. The time it takes for this to happen is a good indication of battery health. Be aware his can be a problem for GPS units with traffic receiver cables however. I only do this when I'm not using the traffic feature.

I guess right now, I don't really care how often I have to replace mine since I have the extended warranty that covers batteries from the store I usually buy my GPS from. I pay the $70 for the 3-year plan, and I always get to upgrade my unit for free to the next newest model at the end of the 3-year period since the battery is always bad by then, but if other people are getting 7-8 years out of their units, then I need to reexacmine whether paying $70 every 3 years really is worth it or if with better practices, I can save myself the extra $200 or so over the course of those same 7-8 years

WuLabsWuTecH

3. On units having this feature, make sure the unit is turned off and not in standby mode when stored. The GPS will completely discharge the battery over time when left in standby. Storing a unit with a dead battery will also shorten it's life.

How do you do this? I think mine always goes into standby.

Either press and hold the power button, or slide left and hold till the POWER OFF? log appears, and answer yes.

For users with sn old 8x0 or 8x5 nuvi, holding the power button will not bring up the Power Off prompt. These devies ALWAYS shut down in sleep mode and will completely drain the battery in just a few days. The only way to get them out of sleep mode is to remove the battery (these devices have removable batteries).

On my 855, I put a small piece of masking tape over the battery contacts to prevent battery drain while it is stored.

I replaced a battery in my 660 that wouldn't hold a charge (Symptoms like reported above) with an 'improved' one from New Power.... I'm thinking 4 or more years ago....

It is still going strong... Keeps a full charger...longer than Stock one!

$.02

I think I need a new battery and will check out batteryship.

If Garmin would correctly polarize their screens then we could use much lower brightness levels thereby making the batteries last long. Not exactly on the subject but good to know.