We do not currently offer HV LiPo batteries. We have found that charging any currently available LiPo cells above 4.2v to 4.35V-4.4V/cell puts the battery in an unsafe state.
The risk of fire is much higher in this state. It's not safe and results in significantly less cycle life. This also includes batteries that are labeled by overseas companies as 'LiHV'.
Unfortunately, some overseas battery brands have pushed this feature as 'safe' so that they can claim a higher Wh/Kg(energy density) on their batteries, while also failing to disclose the
decrease in cycle life and risks if you HV charge. Beware: Overseas tend to Overstate.