Rs 450,000 to convert your tuk to electric, no battery to buy — worth it?

A Colombo firm, LeMS, is now converting petrol three-wheelers to electric for about Rs 450,000, swapping out the engine for an electric motor in roughly two hours. You never own the battery — you swap a dead one for a charged one in about two minutes at a station and pay only for the energy you use, pay-as-you-go. The company claims drivers save close to Rs 20,000 a month compared to running on petrol. Stations are currently around Colombo, with Galle and Kandy said to be next. The case for it: no battery to buy or replace in a few years, no petrol queues, and if the math holds, the conversion pays for itself in well under two years. The worry: you're permanently tied to one company's swap network and pricing, and if stations don't reach your area or the company changes terms later, you're stuck with a converted vehicle that needs their batteries to run. Would you convert your own tuk on these terms, or does owning your battery outright matter more to you than the upfront saving? If you've already converted — petrol, gas, or electric — what are your real numbers? මෙහෙම convert කරපු කෙනෙක් ඉන්නවද? ඇත්තටම ඉතුරුම කීයක්ද?