inquiry to Would I make inquiry about batteries of your company made?

To whom it may concern, Hi, we are WELLS BIO Inc. in Republic of Korea that manufactures small medical devices. We would like to inquire about your products. We are currently using PL3865123P model for our products. However, the newly developed product uses a 7.4V power supply, which makes it impossible to use the existing PL3865123P model. Regarding this, we would like to ask if you have a lithium polymer battery with a voltage of 7.4V, current of 5000mAh or more among your battery models and, its size should be within 7.5x66x126(mm³). Or is there a battery model with the PL3865123P connected in series? In addition, we hope that you recommend the products with RoHS and CE certification. Do you have any products that you can recommend with these specifications? we look forward to your quick response. Thank you.