ultrathin type Li-polymer power bank 4000mah portable power bank USB charger

   Products will be packed in the standard export carton . 

   If you do not have your own shipping partner , we can make shipment to you with our                forwarder ; 

   shipment way will be Fedex , UPS , DHL , TNT , Air transportation , Sea transportation etc. 

1)We provide OEM and ODM service

2)If you have any inquiry or questions,please contact with us,we will reply you within 24 hours

3)If there are some quality problem,we can replace new one for you or repair them for free within warranty period time

4)If you have need our help,we can give you some proposal 

5)We will 100% test the power banks one by one before shipment to ensure the high quality 

Shenzhen DeLong Energy Technology Co., Ltd.(Dlongbattery) is a professional new energy supplier in China focusing on the manufacture, R&D and sale of lithium ion battery product,power bank worldwide ,it was established in 2006 and becoming the leading player in the new energy field through several years development .Delong company integrates the cell manufacturing and offer of power solution in according to different application purpose ,our product are widely applied on:common digital devices battery , high discharge rate battery,powerful electric vehicles battery ,low and High temperature lithium ion battery ,power storage and back-up battery pack etc.  

Q:How many times can this appliance charge for my mobile phone?

A:2-3 times for iphone4 mobile phone

Q:How long will this appliance take to charge my mobile phone full?

A:Approx:1 hour

Q:How long will the power of battery of this appliance remain?

A:3-6 months,however,we suggest you recharge it every 3 months

Q:How about the warranty for this appliance?

A:one year warranty

Q:Does your appliances pass some certificates?

A:Yes,some of our products have CE,ROHS,FCC,MSDS and UN38.3 certificates.

Q:How do you usually ship the goods?

A:We usually ship the goods by sea,air or international express like DHL,UPS,Fedex,TNT,EMS.,etc

Q:How about your products quality?

A:All of our power banks with Grade A 18650 lithium ion battery or lithium polymer battery and with real capacity

Q:How about the leadtime?

A:for samples,the leadtime is only 2-3 days;for large order quantity,the leadtime is about 10-15 working days after payment or deposit