BATTERYINT 36V 7.8Ah Replacement Battery for RFN Warrior Kids SX-E500, SX-E700 R & SX-E800 Electric Dirt Bike
- Regular price
- $139.50
- Regular price
-
$169.00 - Sale price
- $139.50
- Unit price
- per
Vendor : BATTERYINT
Product Type : Electric Dirt Bike Battery
Sku : BI-EDB-RFN50010S3P1826-XT60
Couldn't load pickup availability
36V 7.8Ah Replacement Battery for RFN Warrior Kids SX-E500, SX-E700 R & SX-E800 Electric Dirt Bike
When your kid's Warrior starts dying mid-trail, you don't need a whole new bike — you need a better battery.
The BATTERYINT 36V 7.8Ah pack is engineered as a direct replacement for the RFN Warrior Kids SX-E500 (14"), SX-E700 R (14"), and SX-E800 (16"). At 280.8Wh, it matches the OEM 7.5Ah energy rating exactly, so acceleration, top speed, and runtime feel the same as the day the bike rolled out of the box. No range anxiety, no weak throttle, just more afternoons on the dirt.
Key Features
- DROP-IN OEM FIT — Engineered to the exact dimensions of the factory 7.5Ah pack. Slides straight into the stock battery bay of the SX-E500, SX-E700 R, and SX-E800. No brackets, no adapters, no drilling.
- 280.8Wh CONSISTENT POWER — 30 grade-A 18650 cells (2600mAh) in a 10S3P layout deliver stable 7.8Ah output under load. No voltage sag when the kid hits a hill or punches the throttle.
- BMS PROTECTION BUILT IN — Overcharge, over-discharge, over-current, short-circuit, and thermal protection on board. This is a battery your kid rides on — safety isn't optional.
- XT60 HIGH-CURRENT CONNECTOR — Heavy-duty XT60 plug handles the 500W–700W peak motor cleanly and stays locked in on rough jumps and whoops.
- USE YOUR EXISTING CHARGER — Charges through the stock 5.5mm DC port with your original 42V 2A charger. Full charge in about 4 hours. No new charger needed.
- 90-DAY FREE REPLACEMENT WARRANTY — If anything goes wrong in the first 90 days, we replace it. Email sales@batteryint.com before ordering if you want us to double-check fitment on your bike.
Specifications
| Spec | Value |
|---|---|
| Brand | Batteryint |
| Battery Type | Rechargeable Lithium-ion |
| Nominal Voltage | 36V |
| Full-Charge Voltage | 42V |
| Rated Capacity | 7.8Ah (7800mAh) |
| Energy Capacity | 280.8Wh |
| Cell Configuration | 10S3P |
| Cell Type | Grade-A 18650, 2600mAh |
| Discharge Connector | XT60 Female |
| Charging Port | DC 5.5mm |
| Recommended Charger | 42V 2A (OEM compatible) |
| Full Charge Time | ~4 hours |
| Dimensions | ~195 × 105 × 40 mm |
| Weight | ~1.5kg |
| Condition | 100% Brand New |
| Warranty | 90-Day Free Replacement |
Compatibility
| ✅ Fits | Wheel | Age | Rider Height | Years |
|---|---|---|---|---|
| RFN Warrior Kids SX-E500 | 14" | 4–6 yrs | 110–130 cm | 2024–2026 |
| RFN Warrior Kids SX-E700 R | 14" | 4–6 yrs | 110–130 cm | 2024–2025 |
| RFN Warrior Kids SX-E800 | 16" | 6–9 yrs | 120–140 cm | 2025–2026 |
Does NOT fit: SX-E250 / SX-E400 (smaller battery bay), or any SX-E5 / SX-E8 / SX-E15 (different voltage platform).
Shipping & Returns
📦 Shipping
- Free standard shipping — order total qualifies
- Processing: 1–2 business days
- Delivery: 7–15 business days (US)
- Tracking emailed once shipped
↩️ Warranty & Returns
- DOA: free replacement within 7 days of delivery
- 90-day warranty against manufacturing defects
- Email sales@batteryint.com before returning any item
Can i cancel an order?
- Orders on batteryint.com can be cancelled before shipment.
- Please contact our customer service if you want to cancel your order,After we confirmed the shipping status,we will issue a refund(If we have shipped your order,it will be treated as returns).
- Please note:paypal fee will not refund as the paypal Policy for seller.
- If the battery you purchased is a customized product, cancellation unacceptable.
- If your battery arrives damaged or is not working, you can return it to us within 7 days after delivery or 30 days after shipment in case the delivery date is not traceable. You will receive an e-mail containing the shipment date and other details of your order after it has been shipped.
- Please include all of its accessories, like cables, chargers, batteries, in the returned parcel. If an accessory or component is missing, we will ask you to pay for it. All the return shipping fees will be covered by us.
- We will do our best to ensure that the products shipped to our customers are in their best condition. If your product turns out to be defective, please provide us with the following proofs:
- This clause does not include products of a category with specific warranty terms as well as damages caused by incorrect usage of a product.
- Photos of the front and the back of the package or box;
- Partial shipment slips (if applicable);
- Photo or video of the defective item;
- Photo or video and a detailed description of the problem;
- Upon being returned, the defective item will be refunded or replaced for free.
- Return shipping fee reimbursement is 30% of the item’s price up to a maximum of $30.
If the item you have received differs completely from the one you ordered, please do not hesitate to contact our customer service and to provide us with the following proofs:
- Photos or a video of the incorrect item;
- Photos or a video showing the problem occurred with this product;
- Because different batches of the products are supplied, the item logo or packaging you received may vary from the one displayed on our website. If all the functions and appearance of the product prove to be correct, please understand that this case will not be included in this policy. If a return is necessary, replacement plus shipping cost reimbursement will be issued to you once you send us a return shipping receipt showing how much you paid to return it. Please be sure that the incorrect item you return is in the original package and the merchandise is in the same condition you received it in. For the incorrect item, if you are able to find a use of it and prefer to keep it, you may suggest that to us and we will offer you a certain discount for buying it.
- If you are not satisfied with your purchase, you can return a product within 30 days after delivery to receive a replacement or a refund of its price minus the shipping fees. If the return is not a result of our error, customers will be required to cover shipping cost both ways.
- Please ensure to return the item with its original packaging and accessories in the same condition as when you received it.
If the products malfunctions (except for reasons caused by incorrect usage and accidental or intentional damage) within 90 days after shipment, you can return the product back to us. You should receive an e-mail with the shipment date and other details after your order has been shipped. Once we receive and approve the return,a full refund or replacement will be offered and a shipping cost reimbursement will be issued when you provide us with a receipt of the shipping charges you paid to send it back to us (the tracking number of the return package or a screenshot of the shipping receipt).
The return shipping fee should be less than 30% of the defective item(s) value, and also less than $30(USD). We will cover the actual postage (according to the receipt you provided). If the return shipping fee exceeds the limit above, please contact our customer service for further confirmation.
After 90 days and within 180 days from shipment
After receiving the defective item, we will forward it to our repair center. You will be charged the return shipping fees And Batteryint will charged the send-back shipping fee.
After 180 days from shipment
Batteries are consumables ,We will not accept a refund or a replacement after 180 days from shipment.
How can I return the defective item to Batteryint?
All customers should contact Batteryint Customer Service for approval before sending anything to us before returning any item(contact:sales@batteryint.com) . Batteryint will not be responsible for returned item(s) without notifying us in advance.
Notes:
- The returned products must be in a new and resolvable condition with original packaging, including cartons, parts, instruction manuals, etc.
- The buyer is responsible for the return postage, we will bear all the costs of sending replacement. For the sake of protection, we strongly recommend the buyer to insure the returned goods against loss or damage, and use a shipper who can provide proof of delivery.
- Any return must consult us first, do not accept return without RMA (provided by our customer service).
- Our refund policy only refunds the purchase price (excluding freight and handling charges or insurance).
- Please place a note inside the return package by including the following details(order number;product ID or name;quantity;a short description of the problem that occurred with this product)
- After mailing back the product, please send us the tracking number and a copy of the shipping receipt; if we can not receive this information, we will have to wait until when the product arrives in our warehouse.We have no responsibility to respond to items lost in the return process.
- After we receive your returned items, we must handle any exchange or issue refund.Refunds will be arranged to the same payment method you used to place this order. All the intermediary handling fees and bank processing fees will be at the customer's expense;
- Products beyond the warranty period are not included in the return, exchange and refund policies.
How long will you get your refund?
- If your return request have been confirmed and aprroved by our customer service,we will issue refund after received your returned parcel.
- Refunds will be arranged to the same payment method you used to place this order. All the intermediary handling fees and bank processing fees will be at the customer's expense;
- Normally it will take 3-7 working days to get your money back to your account.
Return packaging requirements
1.If the battery package is unopened, please return it in the original packaging of the battery.
2.If the battery has been taken out and used, please repack the battery for return.
3.Before sending the return package, you need to take a photo of the courier label on the package, which includes the recipient, sender and tracking number.
Packaging requirements are as follows:
- The outer packaging carton of the battery must be packed in a hard carton.
- Do not place any notes, reminders, or printed paper in the package.
- The battery should avoid direct contact between the positive and negative poles. Insulating materials such as plastic film can be used to separate the positive and negative poles, and metal objects that may cause battery short circuits should not be placed in the package.
- The battery needs to be properly fixed in the package to avoid damage due to collision and friction during transportation. For example, fix it with foam or cardboard slots.
For some special batteries, returns need to be packaged in accordance with relevant transportation regulations, such as using packaging materials with fireproof and explosion-proof properties.
Return Address:
Address: 4th Floor, No. 6, xiaoYiwei 6th Road, Dalang Town
City: Dongguan
Province: Guangdong
Country: China
Zip code: 523770
Name: Su xue shu
Phone: 0086-775-42197179
1. How do I know this 7.8Ah battery fits my child's RFN Warrior?
1. This pack is designed for the 14" SX-E500, 14" SX-E700 R, and 16" SX-E800. If your bike is one of those three, it drops straight in. It will NOT fit the smaller SX-E250 or SX-E400 — those use a 5.2Ah pack. When in doubt, email us your model year before ordering.
2. Is this battery safe for my kid's off-road dirt bike?
2. Safety is built in. Every pack includes a BMS that prevents overcharge, over-discharge, short circuits, and overheating. Cells are grade-A 18650 lithium-ion, and the whole pack is wrapped in protective heat-shrink with a secure strap mount.
3. Will performance feel the same as the original 7.5Ah RFN pack?
3. Yes. At 36V 7.8Ah / 280.8Wh, this pack matches the OEM energy almost exactly. Acceleration, top speed, and range feel the same as when the bike was new. No weak power, no voltage sag under load.
4. Do I need to buy a new charger?
4. No. This battery charges through the original 5.5mm DC port and works with your existing RFN 42V 2A charger. A full charge takes about 4 hours. If you need a spare charger, contact us.
5. Why 7.8Ah instead of the 7.5Ah spec on my bike?
5. The factory rating of 7.5Ah is an industry-rounded number. We use 2600mAh 18650 cells in a 10S3P arrangement, which mathematically delivers 7.8Ah. It's the same physical pack — just rated by actual cell capacity rather than the conservative OEM label.
6. Can I install this myself, or do I need a mechanic?
6. You can do it in your driveway in under two minutes. Unplug the XT60 connector, lift out the old pack, drop in the new one, and reconnect. No tools, no wiring changes, no dealership visit.
7. How long will this battery last in real riding conditions?
7. Expect 500+ charge cycles before capacity drops below 80%. For a kids' bike ridden on weekends, that typically translates to 2–3 years of regular use.
8. What if it fails a few months after I buy it?
8. Every battery has a 90-day free replacement warranty. If it arrives dead or develops a defect within 90 days of shipment, we replace it at no cost and cover return shipping. See our returns page for the full policy.
9. Is this a genuine RFN OEM battery?
9. No. This is an aftermarket replacement battery made by Batteryint to OEM specifications. It is not manufactured by or affiliated with RFN/Apollo. If you specifically need an RFN-branded box, this is not the product for you.
10. What if I order the wrong one?
10. Email us at sales@batteryint.com with your bike model before you order. If you receive the wrong part, our 30-day return policy covers it — we'd rather you ask first than ship it back.