Sure thing! Let’s start by crunching the numbers: a courier running a full city sprint might need a battery that delivers about 20 to 30 kilowatt‑hours for a day, but it also has to output 200 to 400 watts on short bursts when the GPS says “sprint!” That’s a power‑to‑energy ratio that usually points to a high‑energy‑density lithium‑ion pack with a fast‑charge feature. How about a quick test—take a standard 10‑kWh pack, run a 1‑kW load for 10 minutes, then charge it back up to 80% in 30 minutes. Measure the voltage drop and see if it stays within safe limits; if not, tweak the cell arrangement or add a thermal management tweak. Let’s see if we can keep the courier moving without a mid‑day recharge!