This article it is going to serve mostly the youth.

There is no single professional application this requiring 9V Battery clip with wire and termination to barrel connector.
Since the moment that Chinese industry this involved with the development of 9V lithium, they also renewed the design of 9V snap PP3 connector.
9V lithium cells in theory, they can deliver larger DC current in comparison to Alkaline and NiMH.
New design of Chinese 9V snap PP3 connector, this is bulky in dimensions.
This is not designed to be an replacement of a Low-profile snap clip for PP3.
Barrel type connectors by design they can deliver several Ampere, small diameter connectors will deliver fewer Ampere.
On average, even the smallest connector this can handle 1.5A as minimum.
The major deception and or cheating, this is happening at the added cable.
If you are careful as buyer?You will avoid any item this using cable with out electrical specifications printed over it.
If you are careful as buyer? You will end up with
26AWG wires, these capable for up to 0.361A and or 360mA.
If you application this demands higher current, then these assembled cables,
they are unable to help you.