I use three different 901>510 type adapters on my SD's. Two were obtained from Madvapes and one from Totally Wicked. I have a standard sized adapter (MV), a 901>ego adapter (MV), and a "
tank" adapter (TW) which is essentially a longer 901>510 adapter. All three function excellently and have done so since their installation on my SD's.
The one problem that might occur is one common to any adapter. If the adapter's insulating sleeve (the part that separates the center post from the body of the adapter) is damaged or mis-aligned, the adapter can cause a short which will possibly damage the
device's battery.
A properly assembled adapter, attached properly, should not cause a battery to heat up or an atty to die quicker. Since center post heights vary depending upon device, I suggest raising the center post on the adapter prior to installing on the device. Once attached, use a multi-meter to see if there is a connection. If not, then gently move the center post in the adapter down until contact is made. I hold the button down and slowly attach an atomizer until it makes contact. If it's snug or pretty close, then everything should be OK.
I have numerous adapters on numerous devices and have encountered a dud adapter now and then. Some have screw-in type adjustable center posts, others are free floating. Best to check each one with a meter prior to use since a shorted center post may not be readily observable.
I tend to order adapters in three's on the off chance that one is a dud. They are generally inexpensive and it's nice to know that I have a backup in case of damage or loss.
Hope that helps.