My PX 80 has 2-year-old 7.2 AH batteries, and some of them are starting to fail a little early. They are all the same model number, but I've noticed that there is some variation in the markings indicating perhaps not all or them were made in the same location or on the same assembly line. I'm actually not entirely sure what the minor markings mean.
I've examined the SYBTU1-PLP cartridges after they showed a fault condition, and found some of the batteries inside melted a little! I carefully extricated the damaged batteries, and I've sourced two 8AH replacements from different manufacturers. The cheaper ones are harder to get quickly, and the more expensive ones come from a supply house across the street, so I have some of each.
| | | | | Stamping | | | | Max | Voltage Regulation | Damage | | | | | | |
| | | | | | | | | | Charge | Standby Use | Cycle Use | Below | | | | | | |
| Code | Manufacturer | Model | | tabs | side | Volt | Ah | HR | Curr. | Low | Hi | Init. Curr. | Low | Hi | Voltage | UPC | Made In | Tabs | | | |
| AA | Apex | APX1270 | | AY11AJS2 | A180521 | 12 | 7 | | | | | | | | | | | | | | | |
| AB | Apex | APX1270 | | BY11AIY1 | A171128 | 12 | 7 | 20 | | 13.7 | 13.9 | <2.1 | 14.6 | 14.8 | | 6 83405 42858 9 | China | F2 (Large) | Constant Voltage Charge | Valve Regu. Rechargable | Nonspillable |
| AHH | Apex | APX1270 | | HHY11AIWa | A171128 | 12 | 7 | | | | | | | | | | | China | F2 (Large) | | | |
| AHF | Apex | APX1270 | | HHY11AIWb | A171128 | 12 | 7 | | | | | | | | | | | China | F2 (Large) | | | |
| B | Bright Way Group | BW1280 | HX12-8 | (none) | 052621FH | 12 | 8 | ?? | ??? | 13.6 | 13.8 | 1.2 | 2.4 | 14.5 | 14.9 | 10.5 | 8 48050 00170 3 | China | F2 (Large) | Replace every 3.5 years | Sealed Lead-Acid Battery | Nonspillable |
| I | Interstate Batteries | SLA1079 | | (none) | HVDUL | 12 | 8 | 20 | 2.4 | 13.5 | 13.8 | ??? | ??? | 14.4 | 15 | ??? | 6 56489 06612 1 | Vietnam | F2 (Large) | | Sealed Maintenance Free | Nonspillable AGM |
I'm wondering what consensus is on mixing different batteries in the same cartridge, 'cartridge pair' A&B or C&D, and shelf.
So far I intend to avoid:
- using different models (which includes amp hours) or ages of batteries in the same cartridge
- using different modeled or aged cartridges on the same 'cartridge pair'
And I intend to keep:
- the same 'blend' of modeled and aged cartridges in the left side (A&B) as is in the right side (C&D) of the battery frame.
Assuming I keep my cartridges clearly marked and labeled, Should I worry about keeping both pairs on the same SHELF identical?
Or does that not matter itself as long as the blend on all the left shelves is equal to the blend on all the right shelves.
In other words, I'm pretty sure it would be bad for all of the left side to be type a batteries and all of the right side to be type b. But if half of the cartridge pairs are a and half are b, does it matter on what shelf number I put them on as long as the left side has the same ratio of a to b as the right side has?
Also, assuming I keep the 'blends' the same on the left and on the right, should I worry about introducing 8AH batteries into a PX that has only known 7.2's?
As you can see in the data table I put together above, the voltage regulation varies a little between each of these batteries.
