🔋 Battery shootout: 48V Mini Bottle vs GTK 72V 20/30Ah vs 72V 40Ah — pick the pack that matches YOUR build!
🔋 MINI BOTTLE 48V 7AH — the stealth commuter
https://thecurrentsupply.myshopify.com/products/mini-bottle-ebike-battery-36v-14ah-7ah-36v-48v-7ah-10-5a-18650-lithium-pack-for-bafang-tongsheng-500w-350w-250w-electric-bicycle
The tidy pick. This bottle-style pack hides right in your frame's bottle mount — no bulky case on the rack, no weird weight balance. 48V 7Ah of real 18650 cells (LG, Samsung, or Sanyo — plus 36V 7Ah and 10.5Ah options). Made for Bafang and Tongsheng 250W–500W mid-drive and hub systems. If your build is a city commuter, this is the one.
🔋 GTK 72V 20/30AH — the mid-power sweet spot
https://thecurrentsupply.myshopify.com/products/gtk-72v-20ah-30ah-lithium-ion-battery-with-bluetooth-bms-20s-for-800w-1000w-2000w-skateboard-bicicleta-electrica-motocicleta
The step-up pick. A true 72V nominal (20S) li-ion pack with a built-in Bluetooth BMS — you can watch your cells from your phone. Grab the 20Ah if you want it light, or the 30Ah if range matters more. Built for 800W–2000W motors on e-bikes, e-scooters, and e-motos. The best balance of power, size, and price in the 72V lineup.
🔋 72V 40AH — the long-range bruiser
https://thecurrentsupply.myshopify.com/products/72v-40ah-li-ion-rechargeable-lithium-ion-battery-pack-bluetooth-bms-for-5000w-8000w-10kw-15kw-electric-snowmobile-tractor-motor
The big-dog pick. 72V and a full 40Ah — that's serious energy for serious motors, from 5000W all the way to 15000W, with the same Bluetooth BMS phone monitoring. This is the pack for high-power EVs, snowmobiles, and big builds where range AND punch both matter.
Honest take: the Mini Bottle wins for city commuters who want a clean, stealthy conversion on a 250–500W kit; the GTK 72V 20/30Ah wins for mid-power builds where you want real power without hauling a monster; and the 72V 40Ah wins when the build is the whole point — big motor, big range, no compromises.
Golden rule: match the battery voltage to your controller. 72V on a 48V controller makes expensive smoke.
All three in stock — pickup in Etobicoke or shipped by Canada Post. 🔋