Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sub-standard, not fit form, functional replacement

The battery contacts do not mate with the original APC system, this is not a fit form replacement to the APC battery. If you bend the ABC contacts you can make the battery contact, but ultimately it would be unreliable.I think this is a case of "you get what you pay for", I was hoping for a fit, function, replacement but found that ABC missed the mark and has provided a sub-standard product which is of no use.