[Coco] Off-topic question for electronics wizards

[Zippster]

Christopher,

It’s kind of hard to say without knowing what kind of feedback the device
gets from it’s battery pack (some can be a bit more involved than a simple
2 terminal battery).  In general though, a device would determine if a fully
charged battery is present based on voltage.

If you show it the voltage it expects from a fully charged battery at the + and -
terminals you may fool it into thinking one is there.

Hmmm, just looked up the battery you referenced and I see it’s a 12v lead acid (gell) type.
Fully charged it should be at 12.7 volts.  Less than that and it might try to charge your adapter.

Don’t know the details of the circuit your device uses but….
If you have a ps that delivers 13-14v, something like that, you could try it.

- Ed




> On Feb 28, 2015, at 3:32 PM, K. Pruitt wrote:
> 
> ----- Original Message ----- From: "Christopher Barnett Fox"
> 
>> Here's my line of thinking... could I "trick" the ONT's battery backup
>> unit into *thinking* it has a fully-charged battery by just using a 120V
>> AC to 12V DC transformer? I have loads of spare "wall wart" supplies
>> around, and I'm sure I could scrounge one up that provides 12V DC. Does
>> the output amperage matter?
>> 
>> Thanks for your time and expertise!
>> 
>> Christopher
>> 
>> 
> 
> Christopher,  I am not an electronics wiz by any stretch of the imagination, but don't mismatch the amperage.  It's bad.
> 
> Look at the battery pack you're trying to replace and see what the amperage output is and don't exceed that.
> 
> I'm sure the knowledgeable guys will be along shortly to answer your question correctly.
>