2-Pack Molicel P45B 21700 4500mAh 45A (10C) High Drain Flat Top Battery – For Power Tools, Flashlights & RC
Description
Short Description
The Molicel P45B is the undisputed king of high-drain 21700 cells, delivering an unmatched combination of 4500mAh capacity and a blistering 45A continuous discharge (10C). This 2-pack is purpose-built for the most power-hungry devices: competition-level heavy-duty cordless tools, high-output 21700 flashlights, and high-performance RC models. With an astonishingly low internal resistance of approximately 8mΩ, the P45B virtually eliminates voltage sag under load, ensuring maximum power delivery from start to finish. The flat top design fits all standard spring-contact devices and is ideal for spot-welding into custom battery packs. When only the absolute best in power and capacity will do, the Molicel P45B is the professional’s choice.
Key Features
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Industry-Leading Performance – 4500mAh capacity paired with a true 45A continuous discharge (10C), delivering both extreme runtime and maximum power in a single cell.
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Ultra-Low Internal Resistance (~8mΩ) – Minimizes heat generation and voltage drop, keeping your device cooler and hitting harder under heavy loads.
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10C Discharge Rate – Engineered for applications demanding instant, sustained high current without compromise. The 45A rating provides ample headroom for most high-drain setups.
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Flat Top Design – Universally compatible with 21700 spring-contact battery holders, chargers, and flashlights. The flat positive terminal ensures clean, reliable spot-welding for pack builders.
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Excellent Capacity for High-Drain Use – At 4500mAh, it offers significantly longer runtime than 3000-4000mAh 21700 cells, while maintaining top-tier current delivery.
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2-Pack Convenience – Ideal for dual-battery regulated mods, single-cell mechanical tubes, or as the foundation for building a high-performance RC or tool pack.
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Molicel Genuine Quality – Manufactured by Molicel, a trusted brand known for rigorous quality control and consistent, reliable cells used by professionals worldwide.
Parameters
| Parameter | Specification |
|---|---|
| Model | Molicel INR-21700-P45B |
| Typical Capacity | 4500 mAh (0.2C discharge to 2.5V) |
| Minimum Capacity | 4400 mAh |
| Nominal Voltage | 3.6 V (typical operating 3.7 V) |
| Max Continuous Discharge | 45 A (10C) (cell temperature ≤ 80°C) |
| Max Pulse Discharge | Up to 60 A (short burst, monitor temperature) |
| Discharge Cut-off Voltage | 2.5 V (do not over-discharge) |
| Standard Charge | CC-CV, 0.5C (2250 mA) to 4.2 V, cut-off 50 mA |
| Max Charge Current | 1C (4500 mA); 2C fast charge possible with strict temperature control |
| Internal Resistance (AC) | Approx. |
| 8 mΩ (AC 1 kHz) | Cycle Life | ≥ 300 cycles (to 80% capacity, 1C charge / 10A discharge) | Operating Temperature (Discharge) | -20°C to 60°C (ensure adequate cooling for sustained 45A) | Top Type | Flat Top | Dimensions | Approx. |
| 21.4 mm diameter × 70.2 mm length | Weight (single cell) | Approx. |
| 69 g | Package Includes | 2 × Molicel P45B 21700 cells in protective packaging |
Applications
Recommended For
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High-Power Vaping: Mechanical mods, unregulated boxes, and high-wattage regulated mods. Safely supports sub-ohm builds drawing up to 45A continuous, with minimal sag for consistent performance.
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Cordless Power Tools: Impact drivers, drills, circular saws, and high-torque wrenches. Perfect for rebuilding tool battery packs where both runtime and instantaneous power matter.
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High-Output 21700 Flashlights: FET-driven or multi-emitter hot-rod lights that demand sustained 30-40A draws. The 4500mAh capacity ensures long turbo runtimes.
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RC Cars, Boats & Drones: Competitive-level models requiring extreme burst currents and longer play sessions.
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High-Performance E-Bike & E-Scooter Packs: Where per-cell current draws approach 45A; the high capacity reduces the number of parallel cells needed.
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Portable Spot Welders & High-Power DIY Projects: Any application where massive pulse currents and reliable energy storage are essential.
Not Recommended For
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Low-Power Long-Runtime Devices: Solar lights, sensors, or clocks. The high-rate capability is wasted; choose a 5000mAh 10A 21700 for better economy.
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18650-Only Devices: This is a 21700 cell (21mm x 70mm) and will not fit in 18650 compartments.
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Standard USB Power Banks: The P45B’s performance far exceeds what a 5V/2A power bank requires; use a high-capacity, lower-cost cell instead.
FAQ
Q: What does the 10C rating mean, and how does it relate to 45A?
A: The “C” rating is a multiplier of the cell’s capacity expressed in amperes. The P45B has a capacity of 4500mAh (4.5Ah). 10C means 4.5Ah × 10 = 45A continuous discharge. This indicates the cell can safely deliver 45A of continuous current without overheating or excessive voltage drop.
Q: Can I use this battery in my 18650 device?
A: No. The P45B is a 21700 cell, which has a larger diameter (21mm) and longer length (70mm) than an 18650 (18mm × 65mm). It will not fit unless your device explicitly supports 21700 batteries. Always verify your device’s specifications before purchasing.
Q: Is this a protected battery?
A: No, the Molicel P45B is an unprotected flat top cell, which is standard for high-drain applications. This allows unrestricted current flow. For single-cell use, your device must have its own built-in protections. For multi-cell packs, you must use an external BMS rated for at least 60A.
Q: Can I solder wires directly onto the battery terminals?
A: Never solder directly onto lithium-ion cells. The intense heat can damage the internal separator and safety mechanisms, leading to permanent damage or a dangerous failure. Always use a spot welder to attach nickel strips. For wire connections, use nickel tabs with pre-soldered leads that are spot-welded to the cell.
Q: How should I store these cells when not in use?
A: Store at a nominal voltage of 3.6–3.7V per cell (approximately 40-50% state of charge). Keep them in a cool, dry place and use non-conductive battery cases to prevent accidental short circuits. Avoid storing them fully charged or deeply discharged for extended periods.
Q: Why choose the P45B over other 21700 high-drain cells?
A: The P45B offers the best balance of extreme current (45A) and high capacity (4500mAh). Competing cells like the Samsung 40T (4000mAh/35A) or BAK 45D (4500mAh/45A) are excellent, but the P45B’s ultra-low 8mΩ internal resistance gives it an edge in voltage stability and heat management under sustained heavy loads.
Shipping and Returns
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Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
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Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
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Easy Returns: We want you to be completely satisfied. If you're not, you can return your product within 30 days of receiving your order. Please ensure the items are unused and in their original condition. For return instructions, please contact our support team.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Security
Refund Policy
OneAndes Return & Refund Policy
At OneAndes, we are committed to providing high-quality cylindrical lithium-ion batteries for your drones, vacuums, garden tools, and other power needs. If you are not completely satisfied with your purchase, we are here to help. Please read our full return policy below before initiating a return.
1. Return Window
You have 30 calendar days from the date you received your item(s) to request a return. Any return request submitted after 30 days will not be eligible for a refund or exchange.
2. Eligibility Conditions
To qualify for a return, all items must meet the following conditions:
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Condition: Items must be unused, undamaged, and in the same condition that you received them.
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Packaging: Items must be returned in their original packaging with all accessories, manuals, and protective covers intact.
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Proof of Purchase: A valid receipt, order confirmation email, or proof of purchase must accompany all returns.
Non-Returnable Items:
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Batteries that have been installed, used, or show any signs of wear.
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Items marked as “Final Sale” or “Clearance” at the time of purchase.
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Customized or special-order products.
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Gift cards.
If a returned item fails to meet these conditions, we reserve the right to deny the return or charge a restocking fee.
3. How to Initiate a Return
Follow these steps to return your product:
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Contact Us: Email our support team at support@oneandes.com with your order number and the reason for return. We aim to respond to all return requests within 24 hours on business days.
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Receive RMA: We will provide you with a Return Merchandise Authorization (RMA) number and return instructions. Do not ship any item without an RMA number.
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Pack Securely: Place the item in its original packaging, include all accessories, and clearly write the RMA number on the outside of the box.
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Ship to Our US Warehouse: Ship the package to the following address:
OneAndes Returns
10320 6th St
Rancho Cucamonga, CA 91730
USA*Important: Lithium-ion batteries are classified as hazardous materials (Class 9). Please follow the shipping guidelines provided in Section 4 below. We recommend using a trackable shipping service and purchasing shipping insurance, as we cannot guarantee receipt of your returned item.*
4. Return Shipping Costs
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Defective or Incorrect Items: If the item you received is defective, damaged in transit, or different from what you ordered, OneAndes will cover the return shipping cost. In this case, we will provide you with a prepaid return shipping label.
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Buyer’s Remorse / Non-Defective Returns: If you are returning an item for any other reason (e.g., no longer needed, ordered the wrong model), you are responsible for the return shipping costs. You must prepay the return shipping cost using a trackable carrier that accepts lithium batteries. We do not provide prepaid return labels for non-defective returns.
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Lithium Battery Shipping Regulations: By law, all returns must be shipped in compliance with applicable dangerous goods regulations. We will provide guidance on proper packaging and labeling. Failure to comply may result in carrier refusal, seizure, or additional fees. We are not responsible for returned items lost or rejected by the carrier due to improper shipping.
5. Refunds
Once we receive and inspect your return at our Rancho Cucamonga, CA facility, we will notify you via email of the approval or rejection of your refund.
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Approved Refunds: If approved, your refund will be processed to your original method of payment within 5 to 10 business days. Please note that depending on your bank or credit card issuer, it may take additional time for the credit to appear on your statement.
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Partial Refunds: In certain situations, only partial refunds may be granted:
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Items not in original condition, missing parts, or damaged for reasons not due to our error.
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Items returned more than 30 days after delivery (reviewed on a case-by-case basis).
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Non-Refundable Fees: Original shipping charges are non-refundable unless the return is due to our error (defective product or incorrect shipment).
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Restocking Fee: We do not charge a restocking fee for defect-free returns, but we may deduct the return shipping cost, which will be deducted from your refund.
6. Exchanges
We replace items only if they are defective or damaged upon arrival. If you need to exchange a defective item for the same product, please contact us at support@oneandes.com. Exchanges are subject to product availability.
If you ordered the wrong battery size or model, please follow the standard return process above and place a new order for the correct item.
7. Damaged or Missing Items
If your package arrives visibly damaged, please take photos of the package before opening and contact us immediately. We will work with the shipping carrier to file a claim and arrange for a replacement or refund. Damaged or missing item claims must be reported within 7 calendar days of delivery. For immediate assistance, you may also call us at (213) 316-8849.
8. Order Cancellation
You may cancel your order without penalty if it has not yet been shipped. To cancel, email us at support@oneandes.com as soon as possible. If the order has already been processed or shipped, you will need to follow the standard return process upon receipt.
9. Warranty
All OneAndes batteries are backed by a 12-month limited warranty against defects in materials and workmanship. This warranty does not cover damage caused by misuse, improper charging, unauthorized modifications, normal wear and tear, or use outside of manufacturer specifications. For warranty claims, please contact our support team.
10. Contact Us
If you have any questions about our Return & Refund Policy, please reach out:
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Email: support@oneandes.com
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Phone: (213) 316-8849 (Mon-Fri, 9 AM – 5 PM Pacific Time)
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Mailing Address: 10320 6th St, Rancho Cucamonga, CA 91730, USA
We aim to respond to all inquiries within 24 hours during business days. Please include your order number for faster assistance.