Garmin 48 memory loss

li-Ion batteries have a bad habit: whenever fully depleted, they lose a few cells, to the extent that they might not be able to hold a full charge if enough cells are damaged. In other words, repeatedly using a laptop (or any other Li-Ion powered device) to battery depletion can shorten the battery's life significantly. You might want to keep the batteries fully charged whenever possible and avoid fully depleting them too often.
There is also the habit of "re-setting" the batteries by using the "fully deplete-fully charge" procedure. It only applies to niMH or NiCD batteries ( and is used to erase the "memory effect" ) but is damaging to Li-Ion batteries for the reason mentioned above.
so if your battery can not full charge,this mean you need change a new battery for your laptop
http://www.aulaptopbattery.com.au

Your battery has probably just reached the end of it's service life, or developed a memory after repeated chargeings without being fully depleted. All rechargeable batteries have an average maximum number of duty cycles. (drain and charge) If your charger has a deep cycle feature, try using this to completely drain and recharge the battery. If it doesn't, try putting it in your trimmer and locking the trigger back for a few hours, then recharge it. If neither of these work, it's time for a new battery. If you do get a new battery, be sure to COMPLETELY drain the battery before recharging by locking the trigger back every few uses to avoid developing a memory and help extend the life of your new battery.

your battery is dead. The electric clicking is a telltale sign that the battery is weak or depleted and does not have enough juice to turn over the starter. This is extremely common when the car is left to sit for an extended period without being used.

the clicking you hear is the starter solenoid trying to engage the starter, but the battery is to weak to do so.

There are a couple solutions. First you can get a set of jumper cables and jump the s2000 with anther battery. Once the car is running the battery will alutomatically begin to recharge.

the second is to buy and use whats called a trickle charger or 'battery tenderizer' this is a small device that you plug into the car and it will automatically keep the battery charged over extended periods of time without the risk of over charging the battery. If you use one of these it will also slowly charge yoru current battery enough overnight for it to work in the morning.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_cd01d4e4178e5a11

You can go to batteries plus or wherever and buy a new 3 volt battery for it. You will have to unsoder the old one and soder the new one back in. Original was a VL1220, I replaced with a Dantona Lith 1-2VLS
http://shop.industrialpartner.com/D/dantona/lith-1-2vls.htm
http://www.fedcobattery.com/b.cfm/all-vendor/lithium-coin/Rechargeable-Lithium-Coin-Cell-for-Printed-Circuit-Mount_VL1220-1VC.htm

You are correct, most GPS units use a lithium ion rechargable battery, typically they loose there ability to retain a charge after about a year or so depending on use, resulting in the unit having to be always plugged in.

You probably could replace the battery on your own if you could get one, (needs to be soldered into the mainboard) however GARMIN does not sell battery's to consumers, they state that a battery can only be replaced by a garmin service tech.

Check the link below for contact info for garmin.

https://buy.garmin.com/shop/shop.do?pID=290&tab=sp340

Hope this helps
http://pchelpforanyone.blogspot.com

It is probably one of the following:
1)Old Software
In 1999 the GPS satellites were reset and the new almanac data had to be loaded into the GPS 45 for it to continue to work. It was not uncommon for that model to quicly kill a set of batteries when it is having difficulty acquiring, which would cause it to shut down in order to save the batteries for its internal memory.

I just did a quick search of the Garmin website and it appears they no longer support that model. If you go to their support page and send a request for a software update they can probably e mail it to you. The update is free but to down load it, you need a PC interface cable (RS232 serial port connector) Part Number: 010-10141-00 Suggested Retail Price: $ 38.09.

2)Bad antenna
To rule this one out, borrow an antenna from another Garmin 45 or Garmin 48, or plug the unit into an external antenna and see if the unit still shuts down. The drawback to this method is that you can buy a new GPS that is superior to the one you have for about the same price as an external antenna.

3)Bad batteries
If your batteries are low, the unit will automatically shut off to protect its internal memory. I tried a lot of different batteries in my 45 and I found that Eveready alkaline batteries worked best. Rechargeable nicad batteries don't work very well because they fool the battery meter. Newer models have a setting to specify that you are using rechargeable batteries.

Ultimately the best advice I can give you is buy a new GPS. For less than $150 you can buy a new model that is more accurate, more reliable, stores more waypoints, has a better display, is easier to use, and gives you more valuable information.

Please rate this information as helpful.

The back up battery always shows 100%, as far as my experience shows. The backup battery is only utilized to retain memory while the main battery is dead. The backup battery charges first, so if the ppc has enough juice to be turned on, the backup battery should be at 100%, unless it is plugged in and you are just now turning it back on. Even so, it will probably still show 100%.

Basically, you left it on too long and all the batteries died. Sorry, but your data is gone :-(

-are all pda's this way? All PocketPCs are this way. I don't own a P**m so I can't speak to them. -When the main battery depletes to the point where the unit shuts off how long do you have before data is lost? Until the backup battery dies. -Is the backup battery just used when changing main batteries or does it take over when the main battery goes dead? If so how long do you have before it is dead? I've never had it happen, so I cannot say how long, but if you continue to try to use the PDA on the backup battery it won't be long (minutes) if it even lets you do that. The backup is there to bridge over battery changes and to act as a safety net if you run the main batteries totally flat. -does the backup battery recharge or does it have to be replaced? Replace. -with a fully charged unit how long can it be left off before data is lost? Depends on the machine. Most of us leave the thing in the charger overnight every night, so this issue doesn't come up. You could try an experiment for 1, 2, 3 days, looking each day at the battery remaining and work up an estimate. I would expect maybe a week or more. Remember, even "off" the machine is still drawing power to maintain the RAM memory.