Chemical waste

Recently the batteries failed abruptly in one of our UPSes. When we came to replace them it was very obvious why. Here’s the battery pack immediately after removing from the UPS. The batteries are meant to be flat on top but these have bulged out so much that it took a lot of effort to get them out of the unit.
And here’s one of the batteries after removing from the pack. This one is not just bulging, it has actually split open.
They have now been safely disposed of in the chemical waste store and the UPS is working again.

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