Description
Li-Ion Backup battery for Studer A810/A812/A816/A820/A827
The new battery module is a multi-layer assembly that fits neatly in the existing space.
- Low risk of leakage.
- Intelligent battery management and charging.
- 160mAh capacity. More with supercap.
- Status LEDs for charging and status.
- Easy installation & testing.
- Fits in same space as original battery.
- Just one extra wire connection required.
- Available as Li-ION only, or with additional super capacitor (0.22F). Will also be available with 0.47F when these capacitors are available again.
Data sheet: Studer Li-Ion Backup Battery Page2: Datasheet-page 2
A better backup battery for Studer A810/A812/A816/A820/A827
My Studer A812 showed significant signs of damage after spending a few years in storage. The RS/Varta V150H 3.6V Nickel metal hydride had leaked quite badly, corroding the tracks on the MPU board, and even the steel card frame. Major surgery had to be performed on the MPU board!
As battery technology has improved dramatically since 1985, I decided to find a way to make a better battery using modern components.
The first step was to examine the circuit diagrams and board layouts for all the Studer machines that use this type of backup battery. The Vart V150H is common to Studer A812/A816/A820/A827 and all but the earliest version of Studer A810 (with MPU 1.810.752.00). With the exception of Studer A810 MPU type 1.810.780.xx, they all use a single diode to charge the battery from the 5.6V power rail. See attached pics. It was clear that it would be possible to design a backup battery for Studer to fit the above tape machines, provided that it could fit in the same physical space as the existing battery.
