Browsing, mailing, gaming, each of these activities drains your smartphone’s battery. A thriving secondary market exists in portable chargers, smart-charging stations and battery cases, but that’s not really an ideal solution. Lenovo’s P780 is a great mid-range phone that has been optimized to keep going for much longer, so that you can actually use all the great features that come with your phone, instead of turning every function off so that the phone doesn’t switch off before you get home.

In terms of hardware, the 5-inch phone isn’t exceptional, but that’s not the point. Phones have reached a point of diminishing returns in hardware, and if you’re using the phone for checking maps, social networks, and games like Angry Birds instead of the few processor-intensive games out there, then you won’t be even remotely disappointed with the performance of the P780.

It has a quad-core 1.2 GHz processor and 1 GB of RAM, and 4 GB of internal storage along with support for a microSD card. The internal storage could be bigger considering the price, but it’s not a deal-breaker. The 8 MP camera on the back is actually really good; it’s not in the same league as some of the new flagship phones, but it focuses and takes pictures quickly, and the images are clear.

The 720x1,280p screen is bright, with good contrast levels—reading on this handset never caused discomfort, even with small text. It’s a dual-SIM phone, which has proven popular in India. But the biggest draw is the 4000mAh battery.

The rate at which I normally use my phone, I need to fully charge it every night and then top it up for a while around 3-4pm. This has been the case with most handsets. With the P780, even 48 hours after the phone was fully charged, the battery was at 24%.

In fact, the phone ships with a USB on-the-go cable, which converts the charging slot into a full-sized USB port, which you can use to charge up a second device. Say you’ve got a phone number saved on another phone, and it’s switched off because the battery ran out? With the P780, you can have the second phone up and running again.

While the phone is pretty amazing because you can finally use things like the GPS and Bluetooth without the battery running out in the middle of things, there are a few drawbacks too.

For one thing, the big battery means that you have a thick, heavy phone. It’s still a modern smartphone, and it isn’t actually uncomfortable, but at 176g, it gives competition to Sony Xperia Z1, which has a 20.7 MP camera, and to Samsung Galaxy Note 3, whose screen is almost an inch larger, and both phones also have a great battery life (admittedly, less than the P780).

The other problem is Lenovo’s Android skin—while it does add a lot of helpful features, including inbuilt power and performance management tools, it isn’t one of the best-looking implementations around. Thankfully, with Android, that’s easy to change.

Overall, the P780 is a very competent phone, that becomes really interesting when you take the battery life into account, and at 18,799, it’s a great buy.

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