The Vax OnePWR 4.0Ah Max Li-ion Battery in black is a high-quality replacement battery designed specifically for Vax vacuum cleaners. This electric battery is compatible with the OnePWR model and is suitable for stick, upright, and handheld vacuums. Made in China, this battery is a reliable and efficient power source for your cleaning tasks, ensuring a consistent and strong suction power for your Vax vacuum. With a sleek black design, this battery is a practical and essential accessory for maintaining the performance of your Vax cleaner.