[OnePlus 6T  Accessories] gnabtib8:
Why would you even consider this battery case? We all know the OnePlus 6T has great battery life and at first it may seem redundant to even need this accessory. Stay tuned, you may find a solution to problem you didn't know you had to deal with.

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Sadly the days of user replaceable batteries are over and opening your device is not an option for alot of people. Not everyone has the luxury of buying a new device every year, so for some they stay with their device until it stops functioning. New studies have shown charging 20% to 80% will indefinitely increase the lifespan of your device. But even with this new charging habit you will lose 40% of your battery capacity. That suddenly makes the 6T's battery life go from 3700mAh to 2220mAh. This most certainly will not last you the whole day especially if you depend on wireguard or openvpn protocols, as a result healthy charging habits don't seem like a viable option. Carrying around a battery pack with a cable wrapped around device in your pocket isn't exactly an elegant solution.

First thing is first, here are screen protectors I have found are compatible with the Zerolemon Battery Case. I'm sure there are plenty more but this is what I tested. Once you decide which screen protector is right for you, remember a Glass Screen Protector is in your best interest. The added weight of the battery case will not pair well with a film protector if you drop it on the floor. It will most certainly crack your display upon impact with using a film protector.​

Compatible

T-Mobile Puregear Glass Screen Protector

OMOTON Tempered Glass Screen Protector (Not Full Coverage)

Skinomi Case Friendly HD/Matte Film Protector

IQ Shield Case Friendly HD/Matte Film Protector

Not Compatible

Official OnePlus 6T Glass Screen Protector

I_B_Y_W_I_N_D Glass Screen Protector (Black Border version)

Kiss Rainbow Full Coverage Glass Screen Protector

You engage and disengage charging on the battery case with long pressing the button on the back. You will even get a handy battery meter on the back of the battery case to show the current charge left with a single press of the button. If your using XDA, I can safely assume you rooted your device and can take advantage of Battery Charge Limit. This app is available on the Google Play store and can help with maintaining healthy Charging habits. Once enabled it will safely disable charging to 80% on the default settings. You will get a notification on your device letting you know the app will do it thing and will give you an alert to remind you to turn off the battery case and disable the charging service once your at 80%. Otherwise your device will charge until 80% and then recharge at 77% using its default settings. You can tweak these settings to your liking, but I find the default ones are good enough for my usage. For those who are wondering, you can completely charge the zerolemon battery case without charging the 6T past 80% using Battery Charge Limit. Keep in mind the charging of the Zerolemon Battery Case is slow and will not take advantage of OnePlus' proprietary dash/warp charging. You can get about almost 4 full charges from 20%-80% in my usage out of the battery case before it needs to charged again.

By far the biggest flaws with this case is losing NFC and use of the headphone jack adapter. While it's not the focus of my review you can enjoy charging of other devices using it's USB port on the right. But for the price of 59.99 USD, its not bad considering its faster and easier than opting for a battery replacement in the future. A breath of fresh air for me after having to consistently replace my old nexus 6p's battery so often. This accessory has gotten me to utilize healthy battery charging habits. It's not perfect but I can recommend it if you plan keeping the OnePlus 6T during its lifetime. You can purchase the OnePlus 6T Zerolemon Battery at amazon for those who are interested.​

Package Contents:

1 x ZeroLemon OnePlus 6T 7500mAh Battery

1 x TPU Case

Specifications:

Capacity: 7500mAh

Input: 5V/2.0A

Output: 5V/1.8A

Dimension: 6.83 x 3.11 x 0.89 inches(L x W x H)

Weight: 7.4 oz/210g