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Every time a new mobile phone comes out, one of the biggest questions asked isn’t what the chip is inside is all about, how fast things load or what pictures look like in low light.

Time and time again, it’s all about one simple thing: how good the battery is.

To help bring some clarity to what works out there, we’ve compiled a list of the top phones currently on the market and what various tech blogs consider their battery life to be. By comparing all the data we’ve found, we hope to give you a clearer idea of what power bank would work best for your phone. 

Mobile phone battery sizes compared:

  • OnePlus 6
  • Google Pixel 3
  • iPhone XS
  • iPhone XR
  • Samsung Galaxy S8 
  • Moto G7 Power
  • Huawei P30 
  • Sony Xperia 10  
  • OnePlus 6

    Battery Size: 3,300 mAh

    For a while now the OnePlus has been the underdog of the Android world. While the new OnePlus7 has only launched and is being run through the gamut by tech bloggers, the 6 is arguably the biggest underdog in the battery game.

    The phone uses Dash Charge to get you going for the day in no time at all. Even if you forget to plug it in before going to sleep, a quick 15 minutes in the morning can work wonders.

    If you’re on your phone extensively throughout the day, you might need a top-up in the evening. For someone using it all the time at full brightness with every feature on for work, you’d need a recharge earlier in the afternoon.

    Expert Battery Verdict: “OnePlus says it gives you ‘a day’s power in half an hour’, although we’ve found average daily usage generally needs closer to 80% charge gets you a full day” (TechRadar)

    Best power bank to get for it: 2600 mAh Power Bank

    Google Pixel 3

    Battery Size: 2,900 mAh

    It mightn’t look like the sleekest phone out there, but if you spend most of the day using everything Google has to offer, you’d no doubt be best doing it on a phone like the Pixel.

    We’ve read that the phone has some performance issues that software updates have helped over time, but there are no signs that it affects battery life too much.

    Google’s apps love to run in the background, so having them on all the time could see you needing a little top-up here and there.

    Expert Battery Verdict: “I still have battery anxiety with the Pixel 3, and while it gets me through the day, it’s not quite as reliable.” (Trusted Reviews)

    Best power bank to get for it: Pocket 2600mAh Portable Power Bank Charger

    iPhone XS

    Battery Size: 2,658mAh

    Everyone knows iPhones are flashy, but they’ve never been the best when it comes to battery life. After getting found out for slowing certain models down as they get older and not updating the software to help battery life, their most recent releases have said they’d have better battery life.

    You can see when comparing with other phones in this post that the XS has one of the smallest batteries there is, and we’ve found that even in the office you’ll have someone asking for a lend of the communal charging cable or someone’s power bank just to get the phone back to 100%.

    Expert Battery Verdict: “A typical battery usage of about 10-12 hours… however, you may soon experience a rapid battery drain instead of enjoying an outstanding battery life (Technobezz)

    Best power bank to get for it: Chevron 5,600mAh Portable Power Bank Charger

    iPhone XR

    Battery Size: 2,942 mAh

    Just inching ahead of the Google Pixel when it comes to battery size, the XR should be compared to the iPhone (and not the X) when looking at how well it performs.

    Apple promises that the XR has 1.5 additional hours of battery life, perceivably a selling point of picking it over its companion model, with being able to use the phone comfortably for 15 hours without even having to think about grabbing a charger.

    Expert Battery Verdict: “Apple’s iPhone XR had the biggest battery overestimation for talk time on a full charge.” (Which?)

    Best power bank to get for it: Chevron 5,600mAh Portable Power Bank Charger

    Samsung Galaxy S8 Plus

    Battery Size: 3,500 mAh

    Of the recent spate of S models, the S8 is still the most popular with a massive battery tucked inside.  Samsung promises that if you were using it for nothing but browsing on 4G non-stop, you’d be able to get 15 hours guaranteed, the same as being on Wi-Fi; a bold claim to make.

    Expert Battery Verdict: “Galaxy S8 Plus only has a slightly smaller battery than the Galaxy S7 Edge… but the new phones have much larger screens, which can increase drain.” (Cnet)

    Best power bank to get for it: Twister 2,600mAh Portable Power Bank Charger

    Moto G7 Power

    Battery Size: 5,000 mAh

    Pushed as one of the better “budget” phones you can get on the high street, it’s surprising that Motorola is able to create such a powerful Android phone for such a small price. Last we checked both John Lewis & Currys had it on sale for £179, while the new Google Pixel 3a (with a smaller battery) has an RRP of £399.

    If you prefer a no-nonsense phone that may still be going by day two, this could work for you.

    Expert Battery Verdict: “The G7 Power's battery life is the primary reason you should want this phone..” (Toms Guide)

    Best power bank to get for it: 2600mAh Portable Power Bank Charger

    Huawei P30

    Battery Size: 3,650 mAh

    Even though they’re now something of the bad boys of the mobile world, it’s hard to deny that Huawei makes great phones.

    The P30 is their most recent flagship model that boasts about how powerful its camera is. And when you have a camera with three lenses working simultaneously, you know it’s going to take extra battery life if you’re snapping away all day long.

    The phone does promise super-charging, so you can get back to speed in no time at all when you have a power bank handy.

    Expert Battery Verdict: “It's a refreshing change to find a phone that's so big and powerful and yet which doesn't suck up battery life at a worryingly fast speed.” (T3)

    Best power bank to get for it: Pocket 2600mAh Portable Power Bank Charger

    Sony Xperia 10

    Battery Size: 2,870 mAh

    At the time of writing, the Sony Xperia 1 hasn’t come out yet, but that doesn’t mean we can’t look at their most popular model of recent years.

    The Xperia 10 is a little different than most phone these days just because it has a smaller screen and should therefore not drain the battery as badly.

    From looking at most of the reviews that put the battery to the test, if you like watching videos or are an intense daily user, it would require a small charge later in the afternoon.

    Expert Battery Verdict: “The Xperia posted unimpressive endurance results in our testing, some of the lowest in its class.” (GSM Arena)

    Best power bank to get for it: Chevron 5,600mAh Portable Power Bank Charger

    Getting the right power bank

    If your phone is always in need of a charge throughout the day, you might want to consider a power bank. Shop our range today and see which works best with your model. 


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