Alarm Panel Battery

[icellama21]

Anyone tried a secondary power supply connected to the ELK m1 battery terminals with a diode? The larger supply can last for days, and when it dies the smaller battery monitored by the ELK will start discharging. With this you get long endurance and battery monitoring(at least of the smaller battery).

Elk M1 --> + lead
8AH Elk Battery
Diode ---> External power source

--> - lead
8AH battery, External power source

I should also mention to pick your diode carefully based on its properties and the expected current. Some diodes have very significant resistances at lower voltages/currents.

 

[sic0048]

Spam alert!

 

[AceCannon]

Anyone tried a secondary power supply connected to the ELK m1 battery terminals with a diode? The larger supply can last for days, and when it dies the smaller battery monitored by the ELK will start discharging. With this you get long endurance and battery monitoring(at least of the smaller battery).

Elk M1 --> + lead
8AH Elk Battery
Diode ---> External power source

--> - lead
8AH battery, External power source

I should also mention to pick your diode carefully based on its properties and the expected current. Some diodes have very significant resistances at lower voltages/currents.

I confess I am having trouble visualizing the circuit(s) with the schematic you have depicted here. I wonder if anyone can whip up something a little more detailed?

 

[Digger]

Anyone tried a secondary power supply connected to the ELK m1 battery terminals with a diode? The larger supply can last for days, and when it dies the smaller battery monitored by the ELK will start discharging. With this you get long endurance and battery monitoring(at least of the smaller battery).

Elk M1 --> + lead
8AH Elk Battery
Diode ---> External power source

--> - lead
8AH battery, External power source

I should also mention to pick your diode carefully based on its properties and the expected current. Some diodes have very significant resistances at lower voltages/currents.

I confess I am having trouble visualizing the circuit(s) with the schematic you have depicted here. I wonder if anyone can whip up something a little more detailed?

What icellama21 is doing is allowing the system to have a secondary supply/battery and isolating it from the M1 charging but allowing it to power the system. The diode allows the system to draw current but does not allow the charger in the M1 to charge the larger battery. A seperate supply/charger would do that.

By placing a diode in the red lead from the secondary battery the current only flows to the system and not from the charger to the secondary supply.

I cant think of any real drawbacks and there are ways to supervise it etc. As someone mentioned be careful with the diode selection (rating and type). A Shockty (not sure on spelling) diode tends to have less of a drop then a standard diode.