Still running my Alienware M17x from 2009, mostly good. However my battery has been terrible for some time now, and my computer gives me a prompt at boot up that I've had a critical power failure and need to replace the battery. That's fine, batteries die and its been a few years, however,  as the battery type is F310J W075J and dell hasn't carried it for some time, I'm struggling to find a source for a new battery, especially one that will fit my laptop. A number of sources claim that c0c5m batteries are compatible, as well as BTYV01 batteries, but I'm quite skeptical.

Any one have experience on the matter? Shed some light on a replacement battery for my aging yet still capable M17x? I'd prefer not to have a battery explode or have it trapped as a desktop for the rest of its days.