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The Ultimate 2-in-1 Charger Kit with High-Capacity 21700 Batteries!
We have combined the versatile LiitoKala Lii-M4 4-Slot Smart Charger with 4x 21700 5000mAh Li-ion batteries into one perfect bundle. Whether you're a flashlight enthusiast, a DIY battery pack builder, or simply need reliable power for your household devices, this kit has you covered.
The Lii-M4 is a revolutionary charger that doubles as an emergency power bank. Its built-in USB output lets you insert a charged 21700 battery and use it to charge your phone on the go. The professional Capacity Test (TEST) Mode measures the real mAh capacity of your batteries, helping you identify fake or degraded cells. With 4 independent slots and a high-definition LCD display, you can monitor every battery's status in real-time.
Paired with 4x 21700 5000mAh batteries, which feature a stable 10A continuous discharge and an ultra-long 1000 cycle life, this bundle is the ultimate power solution for extended outdoor trips, emergency preparedness, and heavy-duty applications.
( IMPORTANT: Please select your preferred variant. Choose between Flat Top (70.9mm) or Button Top (72mm) batteries. Button Top adds ~1mm length. Also select your preferred plug type: No Adapter, US Plug, EU Plug, or UK Plug. Please check your device's battery bay depth before ordering!)
Charger: LiitoKala Lii-M4
2-in-1 Charger & Power Bank: Built-in USB output allows you to use a charged 21700 battery as an emergency power bank for your phone or other USB devices.
Professional Capacity Test (TEST Mode): Measures the real mAh capacity of your batteries to identify fake, degraded, or low-quality cells.
4-Slot Independent Control: Charge up to four 21700 batteries simultaneously with independent monitoring.
Modern USB Type-C Input: Powered by any standard USB-C cable and 5V/2A USB source (wall adapter, power bank, laptop, car charger).
High-Definition LCD Display: Real-time display of battery type, voltage, charging current, capacity percentage, and elapsed time for all 4 slots.
Battery: 21700 5000mAh
Massive 5000mAh Capacity: Delivers extended runtimes for high-lumen flashlights and power-hungry devices.
Stable 10A Continuous Discharge: Provides reliable power without excessive voltage sag.
Ultra-Long 1000 Cycle Life: Withstands over 1000 charge/discharge cycles with only 50% capacity degradation.
Available in Flat Top & Button Top: Choose the terminal that fits your specific device. Flat Top (70.9mm) or Button Top (72mm).
Charger (LiitoKala Lii-M4)
Brand: LiitoKala
Model: Lii-M4
Input: USB Type-C (5V / 2A)
USB Output: 5V / 1000mA (Power Bank Function)
Output Current: 500mA / 1000mA (per slot, adjustable)
Compatible Chemistries: 3.7V/3.8V Li-ion, 1.2V NiMH/NiCd
Compatible Sizes: 26650, 22650, 21700, 20700, 18700, 18650, 18500, 18490, 18350, 17670, 17500, 16340, 14500, 10440, AA, AAA, AAAA
Display: LCD Screen
Safety Features: Full Auto Stop, Reverse Polarity Protection, 0V Activation, Constant Voltage & Current, Overheat Protection
Dimensions: 100mm × 133mm × 35mm
Weight: Approx. 220g
Battery (21700 5000mAh)
Brand: LiitoKala
Model: Lii-50E
Battery Size: 21700
Nominal Capacity: 5000mAh (Minimum 4800mAh)
Nominal Voltage: 3.7V
Full Charge Voltage: 4.2V
Discharge Cut-off Voltage: 2.75V
Max Continuous Discharge Current: 10A (2C)
Internal Resistance: ≤20mΩ
Cycle Life: 1000 cycles (50% capacity retention)
Terminal Options: Flat Top (70.9mm) / Button Top (72mm)
Weight: Approx. 67-70g (per battery)
High-Lumen Flashlights: Powers tactical and everyday carry flashlights.
Emergency Power Bank: Use a charged 21700 as a backup power source for your phone.
Power Banks & DIY Projects: Build custom power banks and battery packs for robotics and electronics.
Household Battery Management: Charge and maintain your 21700 batteries for various devices.
Travel & Outdoor Gear: Compact and Type-C powered, it's the perfect travel companion.
Q1: What is the difference between Flat Top and Button Top?
A1: Flat Top (70.9mm) is the standard version for most modern devices. Button Top (72mm) has a raised terminal for older spring-loaded devices and adds ~1mm length. Please measure your device's battery bay before ordering!
Q2: Does the charger come with a wall adapter?
A2: It depends on the variant you choose. The "No Adapter" variant includes the charger and Type-C cable only. The "US/EU/UK Plug" variants additionally include the corresponding wall adapter. Please select carefully.
Q3: How does the Power Bank function work?
A3: Insert a charged 21700 battery into slot 4, then plug your phone or USB device into the USB output port on the side. The charger will use the battery's energy to charge your device.
Q4: Can I charge different types of batteries at the same time?
A4: Yes! The Lii-M4 features 4 independent slots with automatic identification. You can charge 21700 Li-ion batteries alongside NiMH AA batteries simultaneously.
Q5: What is the TEST mode?
A5: The TEST mode runs a full charge-discharge-charge cycle to accurately measure the real mAh capacity of your battery, helping you identify fake or degraded cells.
Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
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.
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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:
Condition: Items must be unused, undamaged, and in the same condition that you received them.
Packaging: Items must be returned in their original packaging with all accessories, manuals, and protective covers intact.
Proof of Purchase: A valid receipt, order confirmation email, or proof of purchase must accompany all returns.
Non-Returnable Items:
Batteries that have been installed, used, or show any signs of wear.
Items marked as “Final Sale” or “Clearance” at the time of purchase.
Customized or special-order products.
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:
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.
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.
Pack Securely: Place the item in its original packaging, include all accessories, and clearly write the RMA number on the outside of the box.
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
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.
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.
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.
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.
Partial Refunds: In certain situations, only partial refunds may be granted:
Items not in original condition, missing parts, or damaged for reasons not due to our error.
Items returned more than 30 days after delivery (reviewed on a case-by-case basis).
Non-Refundable Fees: Original shipping charges are non-refundable unless the return is due to our error (defective product or incorrect shipment).
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:
Email: support@oneandes.com
Phone: (213) 316-8849 (Mon-Fri, 9 AM – 5 PM Pacific Time)
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.
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