In order to get battery balancing of battery pack and increase each cell's longevity, we will use the battery pack for the D630.
The battery pack can achieve battery balancing that maximize the capacity of a battery pack with multiple cells (usually in series) to make all of the capacity available for use and increase each cell's longevity.
Typically, the individual cells in a battery have somewhat different capacities and may be at different levels of state of charge (SOC). This is due to manufacturing variances, assembly variances (e.g., cells from one production run mixed with others), different histories experienced amongst the cells in a battery pack (e.g., charging/discharging, heat exposures, etc.) and must be accounted for to maximize life and service of the particular battery pack in use. Each battery pack will be, for these reasons, somewhat different and so every balancing circuit must be able to accommodate those differences. Without effective and appropriate balancing, discharging during use must stop when the cell with the lowest capacity is empty (even though other cells aren't); this limits the energy that can be taken from and returned to the battery.
In generally, if the battery power is lower than 3.4V, the diving light will change to lower mode automatically and can not change modes normally, in this case, please get the batter full charged and try again. If it still doesn't work, please contact the local dealer for after-sale service.
Hello, the light itself has attached O-rings, so you don't need to add the O-rings before using. If the O-ring was broken or fell down, there are extra O-rings for you to replace which come with the package.
Shipments are primarily fulfilled by Express shipping. We dispatch within 2 business days of receiving your payment. Once dispatched, your order should arrive within 7-15 days. The delivery time depends on the country, as well as the location. An order that is shipped to a rural location may take longer.
The narrow beam focuses the lumens of the light into tighter areas that are ideal for pointing out objects of interest and to see into holes, caves, and cracks, covering long distances to illuminate your dive.