Features(22mm round)：
The 22mm round PCB driver has 2 modes(One is highlighted, the other is flashes.)
Voltage boost efficiency: over 95% when when it’s 4V, over 86% when it’s 3V.
Dimension: φ22mm
Reverse connection protection: unique reverse connection protection design, using high current MOS for reverse connection.
Quick start protection: filter capacitors for both input and output
Polarity direction: see pictures
Power supply: recommend 3.7V rechargeable lithium battery (16340, 18650, 14500 or 18500 batteries).
Payment
1.We only accept payments through PayPal (which supports Visa, MasterCard, Discover, American Express, or Echecks). Paypal is a secure payment method for both seller and buyer in e-commerce.
2.Payment must be received within 7 days after winning the item. To claim back the Final Value Fee from eBay, an UPI (Unpaid Item Case) will be filed automatically if buyers fail to make the payment in 7 days after item ends.
3.If you have difficulty paying for the item, please email us to cancel the bid.
Shipping
1.Items will be sent out within 2-3 days on payment received from Monday to Friday. Orders during weekends and holidays will be posted in the following working day.
2.The delivery usually takes 8-25 business days. The delivery time maybe affected by the customs, but it usually reach your hand in the effectively time.
3.Please make sure your shipping address and the order information is correct before placing an order. We will not be responsible for item loss due to wrong or unknown address.
4.International buyers are responsible for duties and customs fees.
Return policy&Warranty
All products have been checked and packaged in good condition before dispatch. In case the item is defective, please inform us within 3 days of receipt. We can arrange replacement for you if the situation is confirmed. Or we can refund you and charge 25% service and handling fee based on the total price of the product (not including shipping fee). Buyer pays both ways shipping if any product is returned.For returned items, we would bear the shipping from China to your address, but you need to bear the shipping from your side to us.