Deal | Lenovo's 20,000mAh 140W laptop power bank is 25% off ($74.99 instead of $99.99) ⓘ Lenovo The Lenovo 140W Smart Laptop Power Bank has a transparent bottom half. Just a few months from its first anniversary, the Lenovo 140W Smart Laptop Power Bank is now available at a discount on Amazon. Officially called the Lenovo 140W Smart Laptop Power Bank, it has a list price of $99.99 , but a limited time deal has seen the price drop to $74.99 (25% off) on Amazon. The Lenovo 140W Smart Laptop Power Bank has a 2.01-inch TFT screen that shows the battery percentage, charging status, voltage, temperature, and the port in use. ⓘ Lenovo The Lenovo 140W Smart Laptop Power Bank has a color display.