37Wh A1245 Battery Replacement for MacBook Air 13″ A1237 A1304 (2008-2009) – Factory Wholesale
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Factory fresh A1245 Battery Replacement for MacBook Air 13″ A1237 & A1304 (2008-2009). High capacity 37Wh 5200mAh Li-Polymer cells with CE/UL certification. Bulk wholesale pricing available.
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Target Models: Specifically designed for the 1st Gen MacBook Air (Original 2008 & Mid 2009).
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Stable Voltage: 7.4V steady output ensures no logic board errors.
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Safety Tech: Advanced Japanese IC controls prevent overheating in the compact Air chassis.
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Business Value: Direct factory supply ensures fresh manufacturing dates (no dead stock).
Product Description
Revitalize the Classic: Premium A1245 Battery Replacement for First-Gen MacBook Air
The original MacBook Air (A1237/A1304) revolutionized the laptop industry. However, finding a reliable power source for these vintage machines is a challenge. Most market options are “dead stock” (batteries manufactured years ago that have lost chemical activity).
At Balder Power, we solve this supply chain issue. As a specialized Wholesale A1245 Battery manufacturer, we produce this model in fresh batches to support professional repair shops, IT refurbishers, and eBay/Amazon sellers. Our A1245 Battery Replacement is not old inventory; it is newly manufactured using modern Li-Polymer technology to ensure peak performance.
Why Freshness Matters for A1245? Lithium polymer batteries degrade over time even when not in use. Our “Fresh-Cycle” production guarantees that the MacBook Air 13 A1237 Battery you receive has low internal resistance and can hold a charge just like the original did in 2008.
Compatibility Note: This battery features the specific connector and form factor for the MacBook Air 13-inch (Early 2008, Late 2008, and Mid 2009) versions. It is the lifeline for keeping these classic collectible machines functional.
Technical Parameters
Specification Sheet
| Parameter | Details |
|---|---|
| Model Number | A1245 (Compatible with A1237 / A1304) |
| Battery Type | Li-Polymer (4 Cells) |
| Voltage | 7.4V (Nominal) |
| Capacity | 37Wh / 5200mAh |
| Color | Black / Dark Grey |
| Warranty | 12 Months Replacement Warranty |
| Condition | 100% Brand New (0 Cycles) |
Comprehensive Compatibility List
Compatible Apple Part Numbers:
- A1245
- 661-4587
- 661-4915
- 661-5196
Compatible Laptop Models (2008-2009):
- MacBook Air 13″ A1237 (Early 2008)
- MacBook Air 13″ A1304 (Late 2008, Mid 2009)
- MB003, MB003LL/A, MB003J/A, MB003ZP/A
- MB543LL/A, MB940LL/A
- MC233LL/A, MC233CH/A, MC233ZP/A
- MC234LL/A, MC234CH/A, MC234ZP/A
- MC503LL/A, MC504LL/A (Specific sub-versions)
- MacBook Air 13.3″ Original Series
Need a stable supply plan? Send your model list + quantities + destination. We’ll confirm lead time, shipping method, and compliance documents before you place the order.
Features & Advantages
🔋 High Density 5200mAh Capacity Don’t let your customers down with weak batteries. Our 37Wh / 5200mAh capacity provides extended runtimes, perfect for web browsing and document editing on legacy MacBook Air models.
🌡️ Precision Thermal Management The A1237/A1304 chassis is notoriously tight with limited airflow. Our battery integrates high-grade thermal sensors that communicate with the MacBook’s SMC (System Management Controller) to regulate temperature and prevent swelling—a common issue with low-quality clones.
🛠️ Perfect OEM Fitment Installation of the MacBook Air A1304 Battery requires precision. Our molds are 1:1 replicas of the original Apple design, ensuring the screw holes align perfectly and the ZIF connector seats securely without stressing the delicate flex cable.
💼 B2B Wholesale Support We understand the needs of the trade. Whether you need 5 units for a repair shop or 500 units for a refurbishment project, Balder Power offers tiered pricing, neutral packaging options, and rapid shipping via certified dangerous goods channels.
Packing & Delivery
Lead Time & Shipping
In-stock items: Ship within 3 days
For standard replacement models with available inventory.Mass production orders: Ship within 7 days
For regular models under confirmed specifications and packaging requirements.Customized orders: Ship within 15 days
For custom cell configuration, size, wire/connector, PCB/BMS, labeling, or packaging.
Note: Final dispatch time depends on total quantity, model complexity, packaging requirements, and shipping compliance documents. We will confirm the estimated shipping date (ETD) after order confirmation.
Air freight (urgent, smaller volume)
Sea freight (cost-effective for bulk)
Rail / Truck (subject to destination)
Express channels
Documents available: UN38.3 / MSDS / Transport Test Report (if applicable)
Compliant packaging and carton labeling can be arranged based on the chosen shipping method.
EXW / FOB / CIF / DDP available
Why Choose Us As Your Wholesale Laptop Batteries Supplier?
With 10+ years in lithium battery production, 1,600+ standard & custom models, and shipments to 40+ countries, Balder Power build replacement batteries with consistent performance—ready for wholesale and OEM supply.
10+ Years Production Know-How
We’ve focused on lithium battery manufacturing for over a decade, combining practical engineering experience with stable mass-production output.
Model Coverage for Bulk Supply
We support 1600+ standard and customized battery models, helping wholesalers cover more brands and device generations efficiently.
In-House Team & Production Capability
Backed by 100+ engineers and employees, plus advanced labs and production lines, we can respond quickly to specs, compatibility issues, and OEM requests.
Automated Lines + Strict QC
Our workflow is designed for consistency: automated production lines and strict quality control from cell selection to final assembly.
OEM Compatibility Engineering (TI Protocol)
For all replacement batteries, we use 1:1 precision molds and intelligent BMS chips that follow original TI protocols, improving recognition and compatibility with the device.
Shipping-Ready for Lithium DG
We’re experienced with Class 9 DG shipments, and can provide UN38.3 & MSDS documents. For small orders we can use DG express channels; for bulk, we can support cost-effective DDP options.
Complete Your Repair OR Retail Inventory: More Apple Battery Solutions
Our Quality Commitment: How We Manufacture Your Laptop Batteries
At Balder Power, transparency in our manufacturing process is the foundation of our partnership with you. We adhere to rigorous industrial standards to ensure that every battery you receive is stable, safe, and high-performing.
Every single cell entering our production line must pass through strict capacity grading. We utilize high-precision grading cabinets to measure the actual capacity, internal resistance, and voltage of each cell. By grouping only perfectly matched Grade A cells, we prevent premature degradation and ensure an extended cycle life for the final battery pack.
We utilize advanced high-speed automated assembly lines to weld individual lithium cells into unified packs (e.g., 3-cell or 6-cell configurations). Laser-controlled precision welding ensures ultra-low internal resistance and uniform connectivity across all nickel tabs, providing significantly higher structural integrity and current stability than traditional manual welding.
The Battery Management System (BMS) is the brain of the battery. Our protection boards are manufactured on fully automated SMT (Surface Mount Technology) lines. This automation eliminates human error, ensuring that every safety component—from overcharge protection to short-circuit safeguards—is soldered with microscopic precision for consistent electronic stability.
Superior final assembly is critical for efficient current conduction. Our expert technicians utilize professional pulse spot-welding equipment to join the completed cell packs with the BMS boards. This process ensures low-resistance connections that can easily handle the high-wattage demands of modern laptops while remaining structurally sound under thermal stress.
Quality is found in the details. Every battery undergoes a meticulous visual inspection after assembly. Beyond checking for aesthetic defects, we use precision calipers to verify that the housing matches 1:1 OEM dimensions, ensuring a perfect fit in the laptop bay without being too tight or too loose.
Every finished battery must undergo at least two full charge-and-discharge cycles on our aging racks. During this process, we monitor voltage curves and temperature changes in real-time. Only batteries that demonstrate flawless performance under high-intensity stress tests are approved for the next stage.
Every single cell entering our production line must pass through strict capacity grading. We utilize high-precision grading cabinets to measure the actual capacity, internal resistance, and voltage of each cell. By grouping only perfectly matched Grade A cells, we prevent premature degradation and ensure an extended cycle life for the final battery pack.
The final step is specialized packaging designed for global logistics. Each battery is sealed in an Anti-Static (ESD) bag and placed within custom-fitted, shock-absorbent lining. Our packaging meets international standards for Class 9 Dangerous Goods, ensuring safe arrival and a premium unboxing experience for your retail customers.
Our lithium battery certifications
FAQ
Q1: How can I tell if I need the A1245 battery or the newer A1405/A1377? The A1245 is only for the original MacBook Air design with the fold-down port door (Years 2008-2009). If your MacBook Air has ports directly on the side (2010 onwards), you do not need this battery. Check the bottom case for model “A1237” or “A1304”.
Q2: Are these batteries “New Old Stock” or newly manufactured? Balder Power supplies Newly Manufactured batteries. We understand that Li-Polymer degrades over time. We run specific production lines for legacy models like the A1245 to ensure distributors receive fresh cells with full capacity, not aged stock from 2015.
Q3: Does the A1245 replacement battery come with screwdrivers? For wholesale bulk orders (industrial packaging), tools are not included to optimize shipping volume. However, for retail-ready packaging orders, we can include the necessary Phillips #00 and Pentalobe drivers upon request.
Q4: What is the warranty rate for these older model batteries? Thanks to our Grade A+ cell selection and modern BMS technology, our defect rate is below 1%. We offer a full 12-month warranty for our B2B partners, providing free replacements for any manufacturing defects.
Q5: Can you ship A1245 batteries to Europe or the USA? Yes. We are a fully certified exporter. Our batteries comply with UN38.3 and are packed according to PI965 regulations. We handle the dangerous goods declaration for air and sea freight to ensure smooth customs clearance.
Q6: Is it difficult to replace the A1237/A1304 battery? It is moderately easy but requires care. The bottom case screws must be removed, and the connector is delicate. We recommend this be performed by professional technicians. We can provide a digital installation guide for your customers.
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