QianLi Macaron Max: Phone Battery Fly Lead Welding Guide

Broken fly leads and torn nickel tabs are among the most common phone battery failures a repair shop sees. The fix is a spot welder — but welding on a phone battery is not the same as welding a big pack. The workpiece is a thin nickel strip millimeters away from a protection board full of components, and one sloppy pulse can burn a pad or kill the board. This guide covers how to weld phone battery fly leads with the QianLi Macaron Max portable spot welder: the dual-pulse settings that matter, the clamp design that protects the board, starting parameters, and — just as important — what this class of welder should not be used for.

First, the Scope: Phone Batteries, Not Thick Packs

The Macaron Max is built around one job: welding thin nickel strips and fly leads on phone battery packs — the flat Li-polymer cells used in IP-series and other smartphones, where the tab is a delicate 0.1–0.15 mm strip sitting right beside the protection board. That is exactly what its dual-pulse output and component-safe clamp are tuned for.

It is not the right tool for thick battery work. High-capacity power banks, power-tool packs, and e-bike batteries need much thicker nickel or copper-nickel composites, and no portable 650A-class welder should be pushed into that job — the welds will look acceptable but fail under load. For phone battery fly-lead repair, though, the Macaron Max hits the sweet spot: enough current for a solid weld on thin strip, with the fine control needed to work safely next to a protection board.

Why Dual-Pulse Output Matters Near a Protection Board

A single high-energy pulse on oxidized nickel does two bad things: part of the energy burns off as sparks, and the rest dumps heat unevenly into the strip — right next to the components you are trying not to cook. The Macaron Max splits every weld into two pulses. First a preheat pulse (03 ms in the default profile) clears the surface oxide layer and lowers sparking; after a short interval (22 ms), the main pulse (13 ms) delivers the actual weld current, firmly and reliably. The machine shows this dual-pulse profile live on its color screen, and preheat + interval + main pulse can be tuned from the main page directly — over a thousand parameter combinations, so you can dial in the exact energy a given strip needs instead of overheating it.

Macaron Max — key specifications for phone battery fly lead welding.

The Clamp Design That Protects the Protection Board

On a phone battery, the danger zone is not the strip — it is the protection board components sitting millimeters from your weld point. The Macaron Max approaches this with a pure copper welding clamp that wraps the battery on three sides, shielding the components on the protection board from the weld point, while the fourth side stays exposed for side welding when the tab position demands it. Combined with the heat-resistant anti-slip silicone pad on the work surface, the cell stays exactly where you placed it while you weld — no sliding, no second contact, no surprise arcs.

Step-by-Step: Welding a Phone Battery Fly Lead

1. Place the cell — lay the battery flat on the silicone pad and slide the copper clamp so it holds the weld point; the three-side wrap shields the protection board components behind it.
2. Adjust the pulse parameters — long-press the power key to switch on, use the up/down keys to tune preheat, interval, pulse, and multi-spot values (the factory starting point of 03 ms / 22 ms / 13 ms suits most thin phone battery strips), and short-press OK to confirm. The screen shows battery voltage, temperature, and the simulated pulse profile as you adjust.
3. Weld — press the pen tips firmly onto the strip so both needles make full contact (never weld through an air gap), trigger, and let the dual pulse complete the weld. Clean oxidized tips with the included file between sessions to keep current flow consistent.

For a strip that needs extra reinforcement, switch to multi-spot mode: one touch outputs a programmed group of pulse groups, which is handy when a tab needs more than a single weld point — without you repositioning between pulses.

One Port to Be Careful With

The side of the unit carries a 5 V OUT expansion port rated at 5 V / 3 A MAX. It is an advanced-use expansion output, not a general-purpose USB charger — QianLi's own guidance is to use it cautiously and only if you understand what it drives. For daily fly lead welding you will not need it; charging happens through the separate Type-C 5 V input.

Frequently Asked Questions