FAQ/Frequently asked questions

Problem classification
LiFePO4 batteries
12V LiFePO4 batteries
24V LiFePO4 batteries
Order
Track your order
Cancel or change your order
Payment
Shipping & Delivery
Guarantee
Returns & Refunds
LiFePO4 batteries
12V LiFePO4 batteries
24V LiFePO4 batteries
Order
Track your order
Cancel or change your order
Payment
Shipping & Delivery
Guarantee
Returns & Refunds
12V LiFePO4 batteries
How is a Power Queen 12V LiFePO₄ battery better than a lead-acid battery?
Power Queen 12V LiFePO₄ batteries are the smarter choice for those who need reliable, long-lasting power. They offer numerous advantages over conventional lead-acid batteries. Here are the most important ones: – 200% more usable power than lead-acid batteries. – 1/3 lighter thanks to compact design. – Five times faster maximum loading speed. – 8 times longer lifespan (over 4,000 deep discharges at 100% DOD). - Integrated battery management system (BMS) for additional protection. - An optional integrated heater for cold climates is available. – 100% safe and reliable performance. – Maintenance-free and sealed design. – Expandable performance with 4P4S (max. 48V/16 units). Although LiFePO₄ batteries are usually more expensive to purchase, their longer lifespan, higher efficiency and low maintenance requirements make them more cost-effective in the long run.
How long does Power Queen batteries last?
We offer a five-year warranty on lithium batteries and a two-year warranty on chargers. Further information can be found in our guarantee conditions.
How do the batteries have to be connected in series or parallel?
To protect yourself, wear insulating gloves when connecting. Pay attention to operational safety during the process. It is recommended to connect the batteries first in parallel and then in series. To connect batteries in parallel, connect positive pole to positive pole (+ to +) and negative pole to negative pole (- to -). Connect the positive pole to the positive pole (+ to +) and the negative pole to the negative pole (- to -). This increases the capacity (Ah). Then connect the batteries in series by connecting positive to negative (+ to -), which increases the voltage (V). If you have multiple batteries, we recommend connecting up to four P 4 S (48V/16 units).
What is the maximum number of batteries that can be connected in series or parallel?
Yes, you can charge a Power Queen 12V LiFePO₄ battery with solar panels. However, be sure to use a compatible solar charge controller (MPPT) designed for lithium batteries.
Can I charge a Power Queen 12V lithium battery with solar panels?
For bundled orders, items will be shipped in separate packages, resulting in multiple tracking numbers. It is possible that these packets may not arrive at the same time. Therefore, please check all tracking numbers on the Shipment Tracking page to track the remaining packages.
Can I use a standard charger to charge your 12V LiFePO4 battery?
Yes, if your charger is compatible with LiFePO4 batteries, you can easily charge your battery with it. You can also check this yourself. To charge our 12V LiFePO4 battery, the charger must meet the following conditions: 1. It must support LiFePO4 battery charging mode. 2. The charging voltage must be between 14.2V and 14.6V. 3. The charging current must not exceed the maximum continuous charging and discharging current. If these conditions are met, you can charge the 12 V battery without any problems.
How do I choose the right charger for a 12V LiFePO₄ battery?
Choose a charger specifically designed for LiFePO₄ batteries with a charging voltage of 14.2 to 14.6 volts without trickle charging or trickle charging. Next, you should consider loading time. For example, a 12V 100Ah LiFePO₄ battery takes about 10 hours to fully charge at 10A, while at 20A it only takes 5 hours.
Can a LiFePO₄ battery be completely discharged before charging?
We recommend not completely discharging a LiFePO₄ battery to 0% as this may shorten its lifespan. To ensure optimal performance and battery life, the charge level should be between 20 and 80 percent. For long-term storage, a charge level of 50 percent is more suitable.
Will the battery be fully charged when I receive it?
Due to shipping regulations for batteries, we charge them to 30 to 50 percent before shipping. Therefore, upon receipt, please fully charge the battery before using it.
24V LiFePO4 batteries
How long does a 24V lithium battery last?
The Power Queen 24 V LiFePO₄ battery typically withstands 4,000 charging cycles at a depth of discharge of 100 percent. However, actual lifespan depends on usage and charging conditions. With regular use and proper care, it lasts ten years or more.
What is the maximum voltage of a 24V lithium battery?
The voltage of a fully charged 24V LiFePO₄ battery is typically between 28.4 and 29.2 volts. Please refer to your battery manual for the exact charging voltage range values.
How to choose a charger for a 24V LiFePO₄ battery?
To properly charge a 24V LiFePO₄ battery, a charger with a voltage range of 28.4 to 29.2 volts is required. If a lower voltage charger is used, the battery can be charged but will not reach its full capacity of 100%.
Track your order
How can I track my order?
After payment is completed, we will process your order and ship it within one to three days. Delivery takes place via DPD/UPS. After shipping you will receive the tracking number by email. You can use this to check the shipping status on the logistics company's official website.
Where will my order be shipped from?
We have several warehouses in Germany. Shipping is organized from the nearest warehouse. We take into account both your delivery address and the current inventory situation.
What can I do if my order is delayed?
Since the cooperating logistics companies sometimes face unexpected situations during transportation, we apologize for any inconvenience. Please provide us with your order number so that we can request the logistics service provider to deliver your order faster.
I need the order invoice.
No problem. Please contact our customer service and provide your order number and email address. We will send you the invoice after confirmation.
Cancel or change your order
Can I cancel my order as long as it has not been shipped?
Since your order has not yet been shipped, you can cancel or change it.
Is it possible to cancel my order if it has already been shipped?
Unfortunately we are unable to make any changes at this point as your order has already been dispatched. You will shortly receive an email with shipping details. If you no longer need the items, you can return them following our returns instructions.
Where are your batteries made?
The Power Queen batteries are made in China. They consist of EV-compatible cells from Tier 1 battery manufacturers and are intended for use in the automotive sector.
I need the order invoice.
No problem. Please contact our customer service and provide them with your order number.
Payment
Which payment methods do you support?
We support two payment methods: 1. Payment via PayPal. 2. Payment by credit or debit card. 3. Payment with Klarna. We accept the following cards as payment methods: Visa, Mastercard, Apple Pay, Google Pay and Shop Pay.
How can I best reach you?
You can contact us at service.de@ipowerqueen.com per Contact us via email.
Do I have to pay sales tax?
Please note that our prices already include all taxes. You therefore do not have to pay any additional taxes. If you meet the requirements for tax exemption in Germany, you can purchase tax-free goods.
How can I use the discount code?
To redeem a discount code, enter it in the appropriate field in the final step of the checkout process and click Apply. Please note that each code can only be used once. Discounts cannot be combined with other promotions. If a discount code does not work, please check the details provided when you received the code. Also note that codes may only be valid for certain items and most codes have an expiration date or a limited period of validity.
Shipping & Delivery
Is shipping free?
We offer free shipping within the EU. Excepted is Greece, for which an additional shipping fee applies.
Guarantee
How long is the warranty period for Power Queen batteries?
We offer a five-year warranty for lithium batteries and a two-year warranty for chargers. Further information can be found in our guarantee conditions.
Returns & Refunds
What are your warranty conditions?
We offer a five-year guarantee on battery products and a two-year guarantee on chargers. This is subject to users using the products in accordance with the instructions in the product manual. The guarantee period begins on the date of purchase. Please see our warranty conditions for further details.
I received the wrong item. What should I do?
Please don't worry, we will be happy to help you solve the problem. To fix it as quickly as possible, we ask that you provide us with the following information: 1. What is your order number? 2. Could you please provide us a photo of the item you received? 3. Could you please provide us the waybill? Once we receive this information, we will provide you with a prepaid label for returning the incorrect items. We also ensure that the correct item is sent to you. Please do not hesitate to contact us if you require further assistance.
I received a damaged or defective item. What should I do?
Please don't worry. To better help you resolve your issue, please contact our customer service team with the following information: 1. What is your order number? 2. Also, please send us clear photos or videos showing the damage or defect. This helps us understand the problem better and find a quicker solution.
When can I expect the refund?
Please don't worry. Once the battery is received at our warehouse, we will process the refund within three business days. The customer also receives the money back within three working days.

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