Where do repair shops buy MB replacement batteries?

[howardc64]

Order my parts from mobilesentrix.com and iPhone batteries have been excellent. Recently got 3x bad A1534 (2015) batteries. All would work until ~30-40+% and drop to < 10% instantly. Typical sign of cheap batteries.

Perhaps the less popular A1534 model's aftermarket batteries are more source limited. Just find it surprising quality from mobilesentrix (usually fairly high quality aftermarket parts) have been so poor.

BTW, this isn't the only defective parts I've had from mobilesentrix. Amongst others including iPad Air touch screen and A1989 touch bar (display was messed up). But even so, must better than ordering from ebay/amazon.

Where do pro shops order their MB batteries? And in particular for 2015 A1534. Thanks

[mon2]

Return the batteries. They (MobileSentrix) will take them back.

Met far too many vendors in HK during my visit last October. DEJI is one that comes to mind that claims to be a high quality vendor. Not sure if they offer batteries for macbook but you can ask.

Ironically - met a few that claim they build the Ampsentrix brand for MobileSentrix but they do not.

This is Sammi from Shenzhen Huidafa Technology Co., Ltd (DEJI factory).

This is our auto-production machine. And we have two auto-production lines for iPhone battery,which can produce 300K pieces batteries per day.

Iphone battery cell brand: Only used: ATL (original batteries for Apple batteries), Amprius, JX The cell cycle time is long over 500 times, other poor batteries only 300times or less, then the battery drop fast, can't use long time.

Sammi: Whats app/ WeChat: 8618565622013

Shenzhen Huidafa Technology Co., Ltd
Company website: www.dejibattery.com
Alibaba: http://huidafa.en.alibaba.com
Whats app/Wechat/Phone : +86-18565622013
Factory address: D-building, Jingchangda Industrial Park, Zhangkengjing Guanglan Baoan district, Shenzhen, Guangdong China

Contact: Sammi <sammi@dj278battery.com>

[howardc64]

Thanks for the prompt response and pointers.

Return the batteries. They (MobileSentrix) will take them back.

Yes, returned the previous 2. Return shipping is on me

Met far too many vendors in HK during my visit last October. DEJI is one that comes to mind that claims to be a high quality vendor. Not sure if they offer batteries for macbook but you can ask.

Ironically - met a few that claim they build the Ampsentrix brand for MobileSentrix but they do not.

I'll ping DEJI although their online store ( link ) + website shows only mobile phone batteries and no laptops.

Ampsentrix cost is on par with cheapest stuff on ebay+amazon yet quality is excellent. I've used probably 20x now. Both complete batteries and cores requiring welding to the BMS. I guess they must have found the high quality supplier

MobileSentrix MB batteries don't have any of their branding. Likely just the same off the shelf generics thats on ebay/amazon. Couple of A1502s were good but A1534 has been poor. I guess these are low volume compared to iPhone batteries and A1534 volume must be the lowest amongst MB*s.

[mon2]

The company that claimed to be THE supplier to them was going under the 'Sunshine' brand. They had a huge 'Ampsentrix' backdrop and were very nervous when I mentioned MobileSentrix. Upon my return, the local branch stated that Sunshine is not their supplier.

Being a 'hazardous' category device, only select couriers can handle batteries from overseas. Keep this in mind but the vendor will know all of the details. We are reviewing assorted batteries for a home automation line of products and somewhat in the same boat. Considering to use iphone batteries since they are relatively low cost; popular; have the ability to offer enough current and can be easily replaced if needed.

[howardc64]

The company that claimed to be THE supplier to them was going under the 'Sunshine' brand. They had a huge 'Ampsentrix' backdrop and were very nervous when I mentioned MobileSentrix. Upon my return, the local branch stated that Sunshine is not their supplier.

Being a 'hazardous' category device, only select couriers can handle batteries from overseas. Keep this in mind but the vendor will know all of the details. We are reviewing assorted batteries for a home automation line of products and somewhat in the same boat. Considering to use iphone batteries since they are relatively low cost; popular; have the ability to offer enough current and can be easily replaced if needed.

Interesting to use phone batteries for home automation. I own a 2013 Tesla Model S and have done repair of these packs with 7k 18650 cells. Let's just say water + electricity don't mix for a battery system that operates and may even live outside in humid/rainy weather. Anyway, you may find it interesting if your system have sufficient interior air volume that require air equalization (at least you won't have altitude change but will have temp change) Here is my post on post moisture failure of this battery pack.

https://teslamotorsclub.com/tmc/posts/8355630/

Oh and if you need liquid cooling (probably not) there are a whole list of designs to avoid from all the early EV pack designs. Ford Focus decided to connect the coolant hoses without accounting for residual outgassing and module expansion resulting in leaks when that happens.. yikes haha.