Hypothetically: if there was a service offering after-market open-hardware sodium-ion batteries for old laptops at a reasonable price, would you be interested in buying them and, if so, how many? I'm talking about old Thinkpads and such. Information about the specific devices would also be useful.
What would be more interesting?
- Aftermarket battery, otherwise identical to original, but not crap like most aftermarket batteries are, and with longer lifespan [LiFePO4 / Sodium-ion cells]
- Aftermarket battery, specific to the laptop model, but with user-replaceable cells and manual [supporting all three of sodium-ion, LiFePO4, and lithium ion based on user preference]
- A set of batteries for different machines that can share the same pack of cells and the same controller, but with adapters for form factor and programmable expected voltage?
Note: I'm very much not committing to anything at this stage. I'm in the process of prototyping a _single battery_ for my _own usage_, and then went, "Wait, I can't be the only one annoyed by all these, we can do better..."
@pixx As it is, I'm already frustrated by having a perfectly serviceable internal battery pack I've got for a Lenovo machine, if not for all the cells being spotwelded together in a way I can't really disassemble :T