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**Reel Slots** Gaming Machines => Bally Reel Games => Topic started by: Chaos on January 01, 2023, 12:28:47 PM

Title: e2000 MPU Battery Replacement
Post by: Chaos on January 01, 2023, 12:28:47 PM
Some of the advice I have read, says that you should add a 1N5817 diode and then use a Li Ion battery instead of the standard fitted Ni Cad battery that usually needs replacing.
What if I want to use a NiMH battery instead, like this one instead of the Li Ion? https://www.mantech.co.za/ProductInfo.aspx?Item=310M0082 (https://www.mantech.co.za/ProductInfo.aspx?Item=310M0082)

(https://newlifegames.com/nlg/index.php?action=dlattach;topic=26792.0;attach=118493;image)

Can I use a NiMH rather than go to a Li Ion and if I do, do I need to add the diode? I assume this is the correct diode? https://www.mantech.co.za/ProductInfo.aspx?Item=72M0616 (https://www.mantech.co.za/ProductInfo.aspx?Item=72M0616)

(https://newlifegames.com/nlg/index.php?action=dlattach;topic=26792.0;attach=118495;image)

Or should I just use this NiCad instead with no mods? https://www.mantech.co.za/ProductInfo.aspx?Item=15M0260 (https://www.mantech.co.za/ProductInfo.aspx?Item=15M0260)

(https://newlifegames.com/nlg/index.php?action=dlattach;topic=26792.0;attach=118497;image)

Or go with this Li Ion and use the diode as originally mentioned? https://www.mantech.co.za/ProductInfo.aspx?Item=15M0456 (https://www.mantech.co.za/ProductInfo.aspx?Item=15M0456)

(https://www.mantech.co.za/Images/Products/ICR18650-22P-666-210722A.jpg)

Which of the above options would be best?

All appear to be 3.6V, so it just depends on which do you guys recommend as best? All seem to have wires/mounting plates that should make it easy to solder in.

Thanks.

Title: Re: e2000 MPU Battery Replacement
Post by: qbert on January 01, 2023, 12:51:42 PM
 :Scratch-Head:
Title: Re: e2000 MPU Battery Replacement
Post by: Chaos on January 02, 2023, 09:22:17 AM
Does no-one know, or am I asking a dumb question?
I suspect the latter  :Scratch-Head:
Title: Re: e2000 MPU Battery Replacement
Post by: Chris-socal on January 02, 2023, 10:50:31 AM
Their point being, you can use a lithium battery as backup but they are not rechargeable and will burst if you drop it into a circuit that is intended to charge a nicad battery. The diode only allows power to come out of the battery when the machine is turned off. It’s essentially a one way valve.

IMO, either way you will end up replacing a battery of some type in a few years. Im not sure why they recommend using Lithium, maybe because the expected shelf life is longer?

Chris
Title: Re: e2000 MPU Battery Replacement
Post by: Chaos on January 02, 2023, 11:06:04 AM
Ah! I gotcha.
I assumed the setup was to allow for a rechargeable Li Ion. I see what you mean, they are using the diode to prevent charging, and only allow power out.
So it's a long term disposable battery?

So what happens if we add a rechargeable NiMH or Li Ion? I guess bad stuff.

What if I add that rechargeable Ni-Cad above? That should be similar specs to what was in there, and I should be able to add it without a diode? Does that sound do-able?
Title: Re: e2000 MPU Battery Replacement
Post by: Chris-socal on January 02, 2023, 11:59:36 AM
If it had a NiCad you can use same capacity or higher of Nicad or NiMh
Lithium isn’t typically used in a circuit that has constant current applied.
Title: Re: e2000 MPU Battery Replacement
Post by: Badbaud on January 02, 2023, 06:24:40 PM
The move away from NiCads and NiMH batteries is because they tend to leak out a chemical that eats traces and socket contacts.
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