Panasonic Batteries

[Jsf721]

I have a Panasonic cordless phone system in my house and one of the handsets refuses to charge. Popped the back off and tried to order the Panasonic batteries. There are plenty of knock offs but no actual panasonic battereis. Seems that the panasonic batteroies out today are AAA sized but mine are 400AH and these are 750 or 800 or 1000. Are they interchangeable since they are both 1.2V or should I get an exact spec knock off. I would rather not replace the phone system.

Thanks

Original part number

BK-40AAABU​

BK-40AAABU 1.2V 400mAh Battery Packs for Panasonic Cordless Phone Handset​

 

[wssix99]

There's no magic in these batteries. If you cut open your old pack with a razor blade, you may find a different manufacturer of the battery cells. They are just 2 or 3 smaller cells, taped together with wires soldered on the end. The cells inside are commodity pieces. Sometimes, I even build these packs myself. (Just get cells with tabs on them, solder them together, and re-use the old wires.)

When I last had regular telephones, I would just buy generic battery packs and kept a spare in my parts bins - but you don't want to stock up too much. They don't have an infinite life on the shelf.

 

[dogdog]

400AH heck you powering a one man submarine or something

Or you can just get a 1000mAH one and talk longer, just make sure the voltage is correct

 

[micromind]

With a higher capacity pack, it'll take longer to charge but as noted, it'll last longer too.

 

[justsam]

If the voltage is the same I would have no issue using them. Capacity (mAh) has improved over time in battery technology. The higher rate ones could use a higher charge rate but they will get charged over time.

 

[Jsf721]

If the voltage is the same I would have no issue using them. Capacity (mAh) has improved over time in battery technology. The higher rate ones could use a higher charge rate but they will get charged over time.

Thanks guys I just wanted to be sure I was not going to create a hazard.

 

[walta]

It is very important that you get the same battery chemistry and voltage as the originals.
The wrong combination of batteries and chargers has been known to start fires and make batteries explode.
Read the label on the original. The likely ones are
Nickel metal hydride (NiMH)
Nickel-cadmium (Nicad)
Lithium Ion (Li-ion)

Walta

 

[Jsf721]

It is very important that you get the same battery chemistry and voltage as the originals.
The wrong combination of batteries and chargers has been known to start fires and make batteries explode.
Read the label on the original. The likely ones are
Nickel metal hydride (NiMH)
Nickel-cadmium (Nicad)
Lithium Ion (Li-ion)

Walta

OK new batteries came in today.

Both Ni-MH
both 1.2V

Old are 400mAh
New 700mAh

So I should be good to go correct?

Thanks

Jeff

 

[micromind]

Yep, the new ones will be ok.

 

[Jsf721]

Yep, the new ones will be ok.

Thanks