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I have the same type of device and I replaced the battery pack with Nickel metal hydrate batteries off eBay, cost about $10.00. Of course I had to make up the cell pack and install and solder the battery pack in.
when charging a new battery for the FIRST time, most require a full 24 hours to be properly charged. Failing to do this will drastically diminish the life of the battery. If you did fully charge the battery the first time, another issue is recharging after EVERY use vs charging when completely drained. Battery will develop memory (although the manf. will say other wise). If you charge after every use and have only used a third of the charge, after a few time of doing this, you will notice that the battery will not last as long. Try one more battery in just one raido. Fully charge it the first time and only recharge when COMPLETLY drained. If the battery is still not holding a charge, it is most likly a short in the radio itself. Return it.
The short answer is: buy a new one. The long answer is: the battery can be replaced with a ATC Cordless Phone Battery 3.6V NiMH for Sanik 3SNAAA55HSJ1 3SNAAA60HSJ1 series (amazon, $3.16)(this battery is the correct size and volt, but has a higher milliamp rating) This, actually, is a battery for a cordless phone. The old battery is not meant to be replaced, but this one will work. To do this: 1) remove the base from the unit, 4 screws can be removed with a long narrow Philips head screw driver. you can insinuate the driver into the corkscrew area. 2) pry off the black switch, this can be done with a small flat screwdriver. 3) slide off the silver sleeve from the unit. 4) separate the black plastic clamshell pieces by removing four screws. 5) remove tape form battery and cut wires next to battery. 6) use a dremmel grinder to create more space at inner side of plastic base part(battery will not allow unit to close as it is flat and OEM battery is curved) 7) solder battery leads to unit leads(electrical tape to cover solders). 8) screw unit together. 9) put axle for switch back into place and slide silver sleeve back over unit.(may need some lubricant and coaxing) 10) screw base back to unit(may need to carefully tape screws to driver so you can get them into place 11) recharge(1-2 hours of work).......or BUY A NEW UNIT.
The blinking light is the flash recharging message. You could try turning off the flash (if the lighting conditions are appropriate for this). In fact if the lighting conditions allow, the camera should default to taking a picture without the flash during the recharging cycle.
The recharge time will be longer if the batteries are low. If the battery is older, it will not hold a charge as well as it did when new and will act like a low battery. Try recharging the battery. If the battery is more than a year old, get a replacement NP-45 battery. If you believe the battery is fully charged, you might need a new charger, BC-45A.
sounds like the electrolyte levels in your battery are extremely low which will cause it to not hold a charge except over the day when the alternator is constantly recharging it, ask a mechanic to either top it up or buy a new battery
take a voltmeter and test charger or borrow a known good one from a friend if you know anyone who has one , sounds like bad charger word--- it is much better to run all rechargeable devices mostly all the way down before recharging as these batteries will do what is know as establish memory and will shorten battery life do not leave on charge except when charge is needed