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Views: 0 Author: Site Editor Publish Time: 2026-06-18 Origin: Site
Standard bare CR1025 coin batteries rely on plastic battery holders for physical installation and circuit connection, which cannot satisfy automated SMT surface mounting, fixed embedded assembly and customized wiring requirements of industrial electronic products. To solve this pain point, customized CR1025 tab batteries are launched with professional pin welding and lead wire processing.
By welding nickel tabs, SMD pins or flexible lead wires on positive and negative terminals of original CR1025 cells, manufacturers realize direct welding installation without extra battery sockets. This article focuses on two mainstream customized solutions:surface mount tabs (SMD pins) and extended lead wire tabs. It covers structural features, processing standards, application scenarios, installation notes and model selection suggestions, helping engineers and buyers pick the right welded CR1025 battery for mass production projects.
A CR1025 tab battery is a modified version of standard 3V lithium manganese CR1025 coin cell, with pure nickel conductive tabs or insulated copper lead wires precision spot-welded on its positive and negative shell terminals. It retains all original core performance of bare CR1025: 10mm×2.5mm ultra-thin size, 3.0V stable voltage, low self-discharge rate and excellent pulse discharge performance.
No need for separate battery holders, saving PCB board space and reducing overall product cost
Support automatic SMT reflow soldering and manual PCB welding, compatible with mass automated production lines
Firm spot welding structure, avoiding poor contact caused by vibration and loose battery installation
Customizable tab angle, lead length and wiring direction to fit different enclosed product structures
SMD tab CR1025 is the most popular customized version for automated PCB assembly, designed for direct surface soldering on circuit boards.
Tab Material: High-purity nickel strip with great conductivity and anti-rust performance
Common Tab Types: Vertical tabs, horizontal flat tabs, reversed bending tabs (customizable bending angle)
Welding Process: Dual-point precision spot welding, firm connection without battery shell damage, no internal performance attenuation
Insulation Protection: Custom insulating heat-shrinkable sleeve optional to prevent PCB short circuit
Maximum reflow soldering temperature: ≤260℃ (short-time soldering support)
Welding pull resistance: ≥5N, tabs will not fall off under normal product vibration
No change in original electrical performance: same capacity, discharge curve and shelf life as bare CR1025
Suitable for flat PCB boards with limited vertical space and automatic SMT production:
Ultra-thin wearable sensor modules and mini fitness tracking devices
PCB clock backup power and CMOS memory backup batteries
Mini smart home induction sensors and ultra-flat alarm modules
Mass-produced consumer electronics requiring fully automated assembly
The lead wire type CR1025 adopts flexible insulated copper wires welded to battery terminals, used for off-board power supply and offset installation away from PCB boards.
Wire Material: Tinned copper core wire with PVC flame-retardant insulation sleeve
Customizable Wire Length: 20mm / 30mm / 50mm / 100mm (support any customized length)
Terminal Options: Bare wire terminals, pre-soldered tin terminals, PH2.0/XH2.54 pluggable connectors
Welding Technology: Nickel transition spot welding to avoid direct wire welding damage to battery stainless steel shell
Flexible lead wire can be bent freely, adapting to irregular internal product cavities
Battery can be placed separately from PCB, avoiding board heat impact during soldering
Plug-in terminal design supports quick battery replacement for after-sales maintenance
Automotive internal auxiliary sensors with scattered internal structure
Sealed integrated devices where batteries cannot be mounted directly on PCB
Industrial miniature detection instruments requiring remote power supply
Electronic toys and medical auxiliary equipment needing reserved replacement ports
Comparison Item | SMD Pin Tab Battery | Lead Wire Custom Battery |
|---|---|---|
Installation Method | Direct SMT soldering on PCB | Off-board wiring & plug-in connection |
Production Efficiency | High, fit for automatic mass production | Medium, mostly manual assembly |
Space Adaptation | Flat PCB space, regular cavity | Irregular, separated internal cavity |
Anti-Vibration Performance | Excellent, rigid nickel tab fixation | Good, flexible wire buffer vibration |
Battery Replacement | Cannot be replaced easily | Easy plug-and-play replacement |
Strictly prohibit secondary welding: Repeated spot welding will damage internal battery sealing structure and cause leakage risk
Control soldering time and temperature: For SMD tab batteries, avoid long-time high-temperature reflow soldering to prevent internal electrolyte deterioration
Avoid tab bending repeatedly: Excessive bending of nickel tabs will lead to welding crack and open circuit failure
Polarity confirmation before assembly: Custom positive/negative tabs can be customized reversely; always check polarity before PCB soldering
Same safety rules as standard CR1025: Non-rechargeable, forbid short circuit, extrusion and piercing
Except standard tabs and lead wires, full personalized customization is available for CR1025 welded batteries:
Custom tab bending angle, tab width and welding position
Custom lead wire length, wire gauge and terminal connector model
Full or half heat shrink tube insulation packaging
High-temperature resistant upgraded version for harsh industrial environments
Custom CR1025 tab batteries perfectly solve the installation and wiring difficulties of standard coin cells in industrial mass production. The SMD pin tab solution matches automated PCB surface mounting for slim and compact electronic products, while the lead wire processing solution fits irregular equipment inner structures and detachable battery design demands.
Both customized versions retain the original excellent performance of CR1025 including ultra-low self-discharge, stable pulse discharge and ultra-thin size. Electronic designers can select matching welding solutions according to PCB layout, production process and product structural space, so as to optimize assembly efficiency, reduce failure rate and cut overall production costs.
