[Philip]

Your third CSB is possibly ok, with its two sold red LEDs. Simply attach a pair of battery packs and see what happens. Since your NiMH's are end-of-life (ie hold very little capacity), try charging the Lithium packs with it. The i180 and XT use the same Lithium packs, so you can put those packs onto either machine.

Ideally, 5-10 seconds after applying mains power to the PT with your (hopefully good) CSB and Lithium packs attached you'll see two solid green LEDs. The LEDs will stay solid green until the packs are mostly recharged (this could take up to 8 hours, but best to leave them attached for 12 hours). After the primary charging phase has completed (solid green), the LEDs will begin to blink quickly (cell-balancing phase) for an hour or two, then shift to slow-blink (trickle charge).

If you have a device that measures watts (or amps) flowing from the mains socket to the CSB, this can provide useful information....

Finally, I'd suggest repacking your NiMH battery packs with modern cells...you'll have yourself a fantastic little p133 to zip around on. Perhaps contact Jason at MTO Battery, he can probably help you out with this.

While the i180 and XT are both much more capable machines in just about every respect, the p-Series delivers a surprising amount of fun - and convenience - for shorter commutes. It really is engaging to ride, and with new NiMH's it will be surprisingly perky!

Riding the p-Series' with its relatively light weight and smaller size reveals a true gap that has existed in the market since its demise. It was a product before it's time, really. I've always argued it was a fatal error to have not had the p-Series make the jump to Lithium and LeanSteer in 2006/7.....Years later, the Ninebot PTR (C and E variants) were pretty much exactly the same dimensions of the p-Series, and pre-merger there was intended to be a T ("Turbo") variant with full redundant sub-systems....you can even see space inside the casting for the redundancy components.