Smartphones have improved a lot in the last few years. And now, we have smartphones with four cameras, high-resolution displays and faster chipsets. However, when it comes to battery, we still use older Li-ion batteries, which can drain out rapidly. All these hardware features require a lot of power and to address this issue, smartphone makers have started including a bigger battery, which can last up to 2 days. Here are the top 5 smartphones under Rs 20,000 with a massive battery.

The Xiaomi Redmi Note 5 Pro has a large 5.99 inch FHD+ 2160 x 1080 px IPS LCD screen. Under the hood, the device has the Qualcomm Snapdragon 636 Octa-core chipset [...]