Nexus 7 Faulty Charge Port & Battery

Finally got around to repairing my Google Nexus 7, which for months has been failing to hold a full charge, and also had a dodgy charge port connection. *MY TEST GEAR ETC* Solder :- Multicore & Warton Metals 60/40, 63/37 -- Diameters - 0.25mm / 0.4mm / 0.5mm / 0.7mm Solder Pastes :- Amtech VS-213-A-TF & NC-559-V2-TF Bench Multimeters :- Keysight 34465A / Keithley DMM6500 H/Held Multimeters :- Keysight U1253B / U1252B / Fluke 289 / Fluke 28II Power Supplies :- TTi QL355T / Keithley 2230G-30-1 / EA-PS5040-40A Multi function Tester :- Fluke 1653B Electronic Load :- ARRAY 3723A Oscilloscope :- Rigol-DS2200 Spectrum Analyser :- Rigol-DSA805-TG Signal Generator :- Rigol-DSG4162 & DG1012 Frequency Counter :- Racal-Dana 1998 Variac :- Carroll & Meynell 8A Microscope :- GT Vision Research Grade GXM-XTL3TV1 Solder Station :- Pace ST100 Rework Tweezers :- Pace MT-100 MiniTweez Hot Air :- Metcal HCT-900-21 - 320W Hot Air Station Hot Air :- Metcal HCT2-200-21 - Hot Air Pencil Screwdrivers :- Wera & Knipex Pliers & Cutters :- Knipex -Various Models Tweezers :- Lindstrom & Ideal-Tek Scissors :- Fiskars Non Stick Micro - https://amzn.to/2LByYNZ Ultrasonic bath :- GT Sonic (6 Litre) Torch :- Olight S1A High Temperature PCB Jig/Fixture Switch Cleaner :- Servisol Super10 Freeze Spray :- Servisol Freeze It *CAMERA GEAR* Cameras :-- 2x Panasonic HC-X920 Sound Mixer :-- Sound Devices MixPre-D Sound Recorder :-- Tascam DR-100 MKII 2x Manfrotto 244RC Variable Friction Arms - https://amzn.to/2qxzl4W 2x Manfrotto Super Clamps - https://amzn.to/2PolGpn Video Capture Card:- Elgato Game Capture HD60 Pro - https://amzn.to/343Ayif *EDITING SOFTWARE* Davinci Resolve Studio 16 iZotope RX7 Youlean Loudness Meter Handbrake Adobe Photoshop CC Adobe Audition CC