We accept:

• PayPal
• Credit/Debit Cards, including:

Visa

MasterCard

American Express

Apple Pay

Google Pay

Shop Pay

Usually no additional bank or international fees are applied beyond product price and taxes.

If charged, please check with your card issuer or review your credit card’s terms.

Try the following:

• different card
  
• PayPal as an alternative

At checkout, enter your code in the “Discount code or gift card” field and click Apply.

Please note:

• single-use
  
• cannot be combined with other offers

No, they are not refurbished. These are unused returns, typically due to:

• Incorrect capacity purchased
  
• Compatibility issues

All returned units are fully tested and only have minor surface scratches from transit.

We still offer a 5-year warranty for used batteries.

The 5-year warranty covers manufacturing defects and performance issues under proper use.

The 10-year lifespan refers to expected longevity with correct maintenance—thanks to our automotive-grade LiFePO4 cells.

We ship from multiple warehouses across the United States. Your order will be dispatched from the nearest warehouse based on your shipping address and inventory availability.

Orders are shipped within 1 business day (Mon–Fri, excluding holidays).

Delivery usually takes 2–5 business days.

We currently ship to:

• → ipowerqueen.com
  
• → ca.ipowerqueen.com
  
• → ipowerqueen.de
  

Note: We do not ship to Alaska, Hawaii, or U.S. territories.

No. We cannot ship to P.O. Box addresses.

Please enter a physical address to ensure successful delivery.

• You’ll receive an order confirmation email and a tracking number email after shipping.
• You can also on our website to view your order status anytime.

Yes — we provide free standard shipping within the continental U.S.

Remote or restricted areas may incur additional charges.

Please contact the carrier directly:

• 1-888-742-5877
  
• 1-800-463-3339 or 1-800-488-3705
  
  Provide your tracking number and confirm delivery details.

Once your order is shipped, we cannot make changes.

If you no longer need the product, you can follow our return process once it arrives.

Go to: https://ipowerqueen.com/pages/register-warranty

Submit your:

• Order number
• Battery serial number
  

Send us your order number and email address.

We’ll send the invoice to your inbox after verification.

At this time, we do not offer expedited shipping.

We always ship from the nearest U.S. warehouse to get your order to you as quickly as possible.

Yes, as long as your order hasn't shipped yet.

Contact us with your preferred delivery timeframe, and we’ll do our best to accommodate it.

We offer a 5-year prorated warranty for all batteries when used correctly per the product manual.

Warranty coverage begins from your purchase date.

1. Our team will respond within 24 hours to help analyze and solve the issue.
2. If the battery has confirmed quality issues (after remote testing with you), we’ll send a replacement or offer a partial refund.
   You’ll return the item using a prepaid return label, and our tech team will inspect the battery.
   
   

• For returns due to personal reasons (e.g., changed mind, wrong capacity), shipping is paid by the customer.
• For product issues, we’ll cover the return cost—contact customer service first.

Sorry for the mix-up! Please provide:

1. Your order number
2. Photos of the received item
3. Photo of the outer shipping label

We’ll resolve it quickly!

We’re here to make it right. Please provide:

1. Your order number
2. SN code (top of battery)
3. Description + clear photos of the issue

We’ll issue a prepaid return label.
Please use it for faster tracking and lower cost than self-shipping.

Refunds are processed after your return is received and inspected at our warehouse.

You may return products within 30 days of receipt.

• We pay shipping if the item is defective, damaged, or misrepresented.
• For customer-related returns (wrong order, address error, etc.), we’ll provide a prepaid return label, and the return shipping cost is deducted from the refund.

You can use a lead-acid charger for short-term charging.

However, for long-term use, we recommend a dedicated LiFePO₄ charger to ensure optimal performance and battery longevity.

Yes, as long as the charger meets these 3 conditions:

1. Supports LiFePO₄ charging mode
   
2. Charging voltage: 14.2V–14.6V
   
3. Charging current is within the BMS protection limit

If your charger meets all three, you're good to go.

Yes! A 29.2V charger is suitable for a 24V battery system built from two 12V LiFePO₄ batteries in series.

Yes — a single 24V battery offers greater system stability.

Fewer connections mean fewer voltage variations and a more reliable setup than connecting two 12V batteries in series.

In most cases, yes.
A single 200Ah battery is generally more stable and efficient than two 100Ah batteries in parallel.

However:

• If space is limited, a single 200Ah is ideal.
• If space is flexible, either option can work.

No, we don’t recommend this setup.

Mixing different capacities (50Ah and 100Ah) is not allowed, as it can cause imbalance and damage the batteries.

For safe parallel connection:

• Use the same brand, capacity, and model
• Batteries should be purchased within 3 months of each other

To expand capacity, only connect identical batteries (e.g., 50Ah + 50Ah).