Is this battery new and healthy?

[rotti_apc]

This was originally posted on APC forums on 8/3/2020

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I bought a new RBC7 battery replacement (17Ah, 24V) pack for a Smart-UPS SMT1500I (1500AV, 1050W) with a AP9631 Network Management Card 2. The NMC2 allows me to collect and plot data provided by the UPS.

So I ran tests: the load is a laptop charger and a traditional light bulb and the powerstrip with power monitor says together they peak at 150W.

1) disconnect the input power from the UPS (see attached picture SMT1500i-RBC7-batt)

2) built-in calibration test (see attached picture SMT1500i-RBC7-cal)

Both diagrams clearly show a 20% battery charge drop right when the UPS switches to battery output. After that drop the battery charge decreases linearly.

Is this normal behaviour of a new and freshly charged RBC7 model battery? If that is normal how is the initial charge drop explained?

[rotti_apc · Accepted solution]

This was originally posted on APC forums on 8/3/2020

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The battery charge reported by the UPS actually dropped as follows:

in test (1): 20%

in test (2): 40%