You may think that the smartphone market is limited to phones with batteries lower than 3500 mAh, but actually, there are some smartphones that went higher than that. True, most phones have 2500 mAh batteries on average, but don't feel too bad, if you want a phone with a large battery, here are three suggestions:
Lenovo Vibe P1m, Li-Po 4000 mAh battery
Lenovo Vibe P1m is actually just a 5 inch phone. Despite the average size, it comes with a massive 4000 mAh battery. It comes in at just around 110 Euro, making it a really good choice if you're looking for a budget phone with a huge battery. Also, it is relatively new, having been released just last month. Furthermore, it is dual sim enabled and it runs Android Lollipop. The display resolution is pretty average as well (720 x 1280, 294 PPI). The remainder of the specs are also a bit midrange (16 GB storage, 32 GB microSD capacity, 2 GB RAM, 8 MP rear cam, 5 MP front cam, FM radio). The only thing that makes this phone more special than the other phones within its level is the battery, which by the way is also fast charging enabled. It's also worth noting that the Vibe P1m is LTE enabled.
Huawei Ascend Mate7, Li Po 4100 mAh battery
Released last year, the Huawei Ascend Mate7 is a large phone with a large screen. It's got a 6 inch screen with a 1080 x 1920 pixel display and it runs Android KitKat from the box (upgradable to later versions). Unlike the Vibe P1m, the Huawei Ascend Mate7 is a bit more expensive, but still affordable at around 400 EUR. Not only does it have a big battery, it also has hefty specs (16 GB storage with 2 GB RAM / 32 GB storage with 3 GB RAM, 128 GB microSD capacity, 13 MP rear cam, 5 MP front cam, FM radio, fingerprint sensor, LTE network).
Huawei P8max, Li Po 4360 mAh battery
For around 500 Euro, you can already own a really beastly phone with probably one of the largest smartphone battery on the market. Announced April and released July, the Huawei P8max is dual sim enabled and has a massive 6.8 inch screen with 1080 x 1920 display. It runs Android Lollipop but it is also planned to get the Marshmallow update. Its microSD capacity is 64 GB, RAM is 3 GB, and it comes with 13 MP rear / 5 MP front cameras. Basically, the best reason to buy this phone is its battery as it is something you do not see on a smartphone everyday.