Mechanical Mod Proper Usage Guide
Battery Basics for Mods: IMR or Protected?
Should you end up getting a Bolt, be extremely careful when carrying it in a pocket or purse. The Bolt has a very prominent fire switch which can be accidentally activated when compressed in tight quarters. Prolonged activation can lead to over-discharge of the battery causing it to go into thermal runaway. This is when a battery goes into meltdown mode which can lead to venting hot gases or even explode.
I have what literally is a minature version of the Bolt, an AltSmoke BB. The button with this mechanical mod is prominent just like the Bolt's. The button became compressed for a prolonged period of time and over-discharged the battery, leading to the battery to go into thermal runaway...venting hot gas and some flames badly scorching the pants pocket. Neither the protective circuit of the so-called protected battery nor the collapsable hot spring in the mod prevented this from happening.

I strongly urge you to buy a regulated variable voltage mod instead of a mechanical mod as your first advanced battery device. Mechanical mods have NO SAFETY FEATURES to protect against short circuits.
Regulated mods have micro-computers which have
built-in safety features to protect against short circuits. Ie auto cutoff of the fire switch after 10 seconds, over-discharge protection, short circuit protection for the atomizer or fire button which shuts the power down to prevent battery melt-down. These features keep a novice out of trouble.
You'll also be able to enjoy
regulated voltage and
higher voltage. In a mechanical mod, your vape experience is at the mercy of the battery - as the voltage drops while using the battery the vape will progressively drop, too. Regulated mods keep the voltage consistant to be the same from the beginning of the battery until it needs to be replaced.
A mechanical mod will only provide around 3.5v - 4.1v, depending upon the charge status of the battery. A variable voltage mod will allow you to use voltages between 3.4v - 6v with the voltage boost circuits of the processor.
Consider the Innokin iTaste MVP. It has a built-in rechargeable battery that can last 2 - 3 days on a charge. It recharges like an Ego battery with a USB charging cord. Also consider a Vamo in the same price range, which uses replaceable rechargeable batteries; you'll need to purchase multiple batteries and a battery recharger.

Innokin iTaste MVP V2.0 - 101 Vape