[Nexus 5 Q&A, Help & Troubleshooting] jajarem64:
All that is needed to repair the broken battery connector is desoldering of the current broken BM22-4S-V surface mounted component, then replacing it with a new one. When desoldering the broken one, I highly recommend a full soldering iron kit, with a roll of desoldering wick/flux, aligning with each contact point you need to desolder, then press the soldering iron against the wick - it'll do just as the name suggests, wick up the old solder. Also, you won't need a solder plunger or sucker, considering the BM22 is a SURFACE MOUNT, meaning the contact point on the component solders to a contact pad on the PCB, in which case you do not need to desolder and suck out solder from the opposing side of the board - the component does not have leads that penetrate through the board. Now, I have not gotten started with my repair, yet, though it does appear there are two contact leads on the wider sides of the component that may penetrate through the board, in which case you will need a kit that comes with a solder plunger/sucker, but to err on the safe side of saving time and money, I'd say go ahead and be sure your kit includes one. You may also require some flux/rosin to dip your desoldering wick, increasing the susceptibility for old solder to adhere to the wick for improved removal. Likewise, if you have a problem getting your contact points to bond with new solder, you can dip your soldering wire in the flux/rosin (if it isn't rosin core solder, you will likely experience this issue).

* For a visual instruction on dealing with removal of solder and contact points that penetrate through PCB, I recommend this video:

youtube: /watch?v=pu-nudUAGVo

* To purchase a soldering kit, I recommend Amazon, where you may attain a decent kit for ~$20.

+ Personally, I recommend this kit, considering it comes with everything you could possibly need for this project:

amazon: /Soldering-Electronics-Adjustable-Temperature-Portable/dp/B071VLFGXL

* You can purchase a BM22-4S-V(53) from DigiKey. I suggest purchasing 5 of them in the event you mess up and melt the plastic on the connector once or twice throughout the replacement process, as well as leaving a few spares in the event you continue to have problems - you may as well, considering shipping will cost you more than the components, and for just a few extra dollars, you can introduce the element of redundancy to your repair which is good practice for anyone working on repairs of the like, reducing costs and overhead time. 5 x BM22-4S-V(53) will run you $5.75 ($1.15/ea), plus shipping, adding a few dollars to your order total. The DigiKey P/N is H122451CT-ND for the Hirose Electric Co Ltd BM22-4S-V(53):

digikey: /product-detail/en/BM22-4S-V(53)/H122451CT-ND/5043185

For future reference, I suggest you map out PCBs, paying attention to any identifiers you can use to search for information, then look for the blueprints or any documentation online which references the name of the component you need to replace. Often times, the PCBs remain the same in the model, thus giving you the ability to search for the product name of the device you're working with, then add into your search the general name of the component itself. There are times when it may be more convenient or necessary to confirm components with visual accommodation, searching through Google images to ensure proper identification or relevant references where someone may have mapped out the component you're looking to identify.

Note: I was unable to post links; therefore, I have provided the end of each URL that comes after the domain name.

As always, be sure you've properly planned your project to save yourself time, money, and avoidable frustration.

Best of luck,

J