[Accessory] Zerolemon Massive 10K battery case

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marctronixx

Senior Member
Jul 18, 2007
1,376
179
https://zerolemon.com/products/galaxy-note-20-ultra-battery-case-10000mah

Many old school XDA members already know this case well, but for new people to the Note series (i.e. Apple converts, etc..) , I thought to write a li'l bit about the Zerolemon 10K case.

I have used Zerolemon's battery cases for years. I am a Galaxy Note series user.

The Note is a powerful device and oftentimes I am out in the wild with no access to shore power.

That's where this case comes in.

I only get the 10K cases and, despite the bulk, I can continue to use my Note 20 in max performance mode out on locations with no worries about losing power. I was able to squeeze about 2 full charges and had some residual charge left to get me back to about 43%. This is with discharging the battery down to less than 10% (usually I would charge at 9%).

The older cases did not allow DEX mode, but with the Note 20 Ultra 5G, you can use DEX wirelessly.

I was able to use wired headphones (AKG N90Q) and still able to wireless charge.

Build quality on the case is what you expect from Zerolemon: Top rate. The rubber is grippy and protects the rear cameras. The case also provides some safety for the front screen.

I received the case with one led lit. All leds were lit in about ~2.5-3 hours. the power button on the Note 10+ last year was really sensitive in that you could turn it on inadvertently. With this years model for the 20 Ultra, the buttons has been more like it was on the Note 9.. it was not as easy to press.

Mounting the phone in the case is straightforward, and I have it down to a science.

Bonus - the Note 10+ belt clip case works with this years case! I have attached a photo showing the belt case from the Note 10+ with the 20 Ultra in it. The only way to get this to work is to have the phones screen faced into the case, so if you still have the belt clip, you can use it that way or have it as a stop gap until Zerolemon comes out with the proper one.

Caveats is the case does not allow super fast charging. This is known from the description so it is not a shock. The other caveat is bulk - if this is an issue for some, the 5K case is a good alternative.

Didn't test out Samsung Pay. This is not something I use anyway even without the case as I prefer to use my Samsung Watch3 LTE to make MST purchases. I will say, on my last Note 10+ 10K battery case, I DID use Samsung Pay and it DID work, so I is possible it will work on the 20 Ultra.

In closing, I've used these cases for years on a few Note series devices. This is my first must have accessory when I get the Note.

Now, only if they can make one for the Z Fold2 5G.... :)
 

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blackhawk

Senior Member
  • Jun 23, 2020
    3,536
    895
    A number of things I don't like about this type of case.
    Lithium fires are no trivial thing, and now you have doubled the amount. If one battery has cataclysmic failure it will take the other one out as well.
    It makes it harder for the phone to dissipate heat.
    It adds a lot of weight and especially with a face plant landing increases the odds of severe damage.
    Signal issues.
    Adds a lot of bulk to already large phone.

    For these reasons I think it's better to take advantage of the large native battery and make use of its fast charging capability than to hang another battery on it.
     
    • Like
    Reactions: michel5891

    njan_ivide

    Senior Member
    Dec 9, 2008
    113
    34
    https://zerolemon.com/products/galaxy-note-20-ultra-battery-case-10000mah

    Many old school XDA members already know this case well, but for new people to the Note series (i.e. Apple converts, etc..) , I thought to write a li'l bit about the Zerolemon 10K case.

    I have used Zerolemon's battery cases for years. I am a Galaxy Note series user.

    The Note is a powerful device and oftentimes I am out in the wild with no access to shore power.

    That's where this case comes in.

    I only get the 10K cases and, despite the bulk, I can continue to use my Note 20 in max performance mode out on locations with no worries about losing power. I was able to squeeze about 2 full charges and had some residual charge left to get me back to about 43%. This is with discharging the battery down to less than 10% (usually I would charge at 9%).

    The older cases did not allow DEX mode, but with the Note 20 Ultra 5G, you can use DEX wirelessly.

    I was able to use wired headphones (AKG N90Q) and still able to wireless charge.

    Build quality on the case is what you expect from Zerolemon: Top rate. The rubber is grippy and protects the rear cameras. The case also provides some safety for the front screen.

    I received the case with one led lit. All leds were lit in about ~2.5-3 hours. the power button on the Note 10+ last year was really sensitive in that you could turn it on inadvertently. With this years model for the 20 Ultra, the buttons has been more like it was on the Note 9.. it was not as easy to press.

    Mounting the phone in the case is straightforward, and I have it down to a science.

    Bonus - the Note 10+ belt clip case works with this years case! I have attached a photo showing the belt case from the Note 10+ with the 20 Ultra in it. The only way to get this to work is to have the phones screen faced into the case, so if you still have the belt clip, you can use it that way or have it as a stop gap until Zerolemon comes out with the proper one.

    Caveats is the case does not allow super fast charging. This is known from the description so it is not a shock. The other caveat is bulk - if this is an issue for some, the 5K case is a good alternative.

    Didn't test out Samsung Pay. This is not something I use anyway even without the case as I prefer to use my Samsung Watch3 LTE to make MST purchases. I will say, on my last Note 10+ 10K battery case, I DID use Samsung Pay and it DID work, so I is possible it will work on the 20 Ultra.

    In closing, I've used these cases for years on a few Note series devices. This is my first must have accessory when I get the Note.

    Now, only if they can make one for the Z Fold2 5G.... :)
    It looks very industrial. Kinda purpose built. I mean why not get a fast charge battery pack? This looks ghastly. Just going against everything note 20 ultra tried to achieve with its design language. I agree Samsung could have gone for 5000mah battery but I don't think this case is the solution to that problem.
     

    marctronixx

    Senior Member
    Jul 18, 2007
    1,376
    179
    the battery case is NOT for everyone. Ive been using these cases for years and never had any issues with them.

    im not concerned about lithium fires. this product has been reliable in my several years use of them on different note phones over that time.
     

    njan_ivide

    Senior Member
    Dec 9, 2008
    113
    34
    the battery case is NOT for everyone. Ive been using these cases for years and never had any issues with them.

    im not concerned about lithium fires. this product has been reliable in my several years use of them on different note phones over that time.
    Back in 2010, I used to rock an iPhone 3g. I had used incase power slider and a mophie juice pack with it. At that time, the iphone screen was 3.5" and with the battery case it was not uncomfortable to hold the phone and those cases followed the same design philosophy of the phone itself. Well I wouldn't dare to say they looked as good but they didn't take away much. BUT now our phones have become massive it's really cumbersome to use a battery case let alone a 10,000mah. I still wouldn't have minded the 5000mah but man I am a sucker for design. There is absolutely no sense of design here with zerolomon cases. It takes away from the aesthetics of the phone.
     

    marctronixx

    Senior Member
    Jul 18, 2007
    1,376
    179
    yall are preaching to the choir. the case will not win any awards in design.

    the case is for functional reasons. i dont expect anyone to use this case on a daily basis, but for those who will be away from shore power for whatever reason, this case delivers.

    the case is not going to allow fast charging for heat related reasons. this is totally understandable given the massive amount of battery in the case and phone. cant have it all.
     

    zedwards

    Senior Member
    Nov 10, 2009
    192
    17
    That's a great case for traveling. Not that I remember what that was like. Using maps, taking pictures, all those are things that use up my battery life in a half a day. This would have been great traveling through in Asia. I used the Samsung brick though which was ok, but quirky.
     

    ryant35

    Senior Member
    Feb 17, 2009
    214
    45
    Cypress
    I got a battery charging case for my Note 9, I think it was one of those deals where you buy it, review it, and they pay you back. I used it maybe twice. Since the case is so huge I always regretted putting it on to recharge my phone and leaving my regular case at home or in the car.
     

    piezan

    Senior Member
    Aug 7, 2010
    201
    38
    i love it, already ordered it. i have the 5k now and cant wait to have the 10k. i have had zero lemon since my note 4 i believe. every phone
     

    白い熊

    Senior Member
    Aug 29, 2011
    719
    268
    相撲道
    I've been using Zerolemon battery cases for many years, starting with Samsungs original Note, always hacking them to increase functionality.

    Currently on Note 20 Ultra I made two physical hacks to the Zerolemon case.

    In the photos enclosed you can see what I'm describing. It's not pretty, but works and adds to the cases utility as far as I'm concerned.

    First — the USB—C charging port is only passthrough for USB—C cables, doesn't work for Dex with HDMI, so I needed physical access to the phone's USB port, so it wouldn't have to be removed from the case. So I cut the case around the charging port — as it's logically connected by film cable. This way I can plug it in and have the battery charge the phone. But it can also quickly be unplugged and an HDMI hub plugged in.

    20210328_153224.jpg
    20210328_153316.jpg


    Second, there is significant empty space next to the phone's camera on the back, which just sits in the battery casing empty. It's actually nice the battery case stays thick there too. I cut the plastic case there and made an incision in the foam plastic battery case on the outside.

    This way I have the full area next to the camera as a container — I put USB flashdrives there, whatever I want to have with me all the time and don't have to carry it outside. This container in the battery becomes a nice carrying pouch for small items.

    20210328_153359.jpg
    20210328_153407.jpg


    I recommended to make these amends - in a nicer industrially designed way - to Zerolemon for their future note battery case versions, alas they didn't respond... :O)
     

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      A number of things I don't like about this type of case.
      Lithium fires are no trivial thing, and now you have doubled the amount. If one battery has cataclysmic failure it will take the other one out as well.
      It makes it harder for the phone to dissipate heat.
      It adds a lot of weight and especially with a face plant landing increases the odds of severe damage.
      Signal issues.
      Adds a lot of bulk to already large phone.

      For these reasons I think it's better to take advantage of the large native battery and make use of its fast charging capability than to hang another battery on it.
      1
      Reminds me of one of these:
      s6vmcsca6ndh0zzymgm9