Yeah for sure, it's frustrating how there aren't readily-available OEM-quality aftermarket batteries available for older laptops. On the upside as for the barrel jack connectors, you can often get multi-connector AC adapters even with variable voltage output switches. My goal is to figure out a singular solar-charged power source for all my portable devices with built-in batteries, to hopefully have some kind of device-agnostic solution, longer-term... Quite the hassle to figure it all out though!