Portable rebuilt battery charge / discharge rates

[desertrout]

I've been using my 5120 on a semi-daily basis for the past few months after a successful repair, overall working great. The battery is one I rebuilt using a 6V/5ah SLA 'brick' UPS replacement battery, and I'm using the 5651 (the 2 amp) adapter (I'm constantly looking for an original 1.5A adapter, no luck yet, wondering if I should switch to an adjustable 1.5 amp adapter in the meantime).

Anyway, I've noticed that the battery *appears* to charge quickly and discharge quickly according to the battery app, though it doesn't quite seem to match reality; if I charge to the point the battery 'level' tops out, then unplug, the level drops down quickly and settles out. If I charge some more for a bit and unplug, the level drops quickly again but settles higher. So it seems to me that what the battery app is showing when charging is not exactly the real charge of the battery.

*Unless* there's an issue with the power manager. However, first I'm wondering if anyone knows if there's a difference in how the original Cyclons charged / discharged compared to these bricks? Is also the 2 amp adapter I'm using a factor?

 

[techknight]

that particular battery isnt quite the same, nor has the same characteristics of the Cyclon batteries. 

and yea, the AC adapter sets the charge current for the SLA. Thats why it was speced at 1.5A. But it shouldnt have any bearing on how long it lasts during discharge. The fast rolloff could simply be the fact that your using one of those cheap emergency lightning style bricks. They arnt very good batteries to begin with. 

 

[desertrout]

Yeah okay, that was my assumption.  I may rebuild the battery again with Cyclons like these https://www.ebay.ca/itm/Dual-Lite-12-264-Emergency-Egress-Lighting-Battery-6V-5AH/274101233898 , just because.

Follow up question: I've heard that if the adapter amperage is higher than the spec 1.5A, even at 2A you run the risk of damaging components over the medium/long term because current draw isn't regulated by the power manager but rather by the adapter itself. Is that true? Should I be swapping to even a regulated 1.5A-max adjustable adapter sooner than later as a safer option than continuing to use the 5651 adapter?