Cartridges for E-Cigarettes Best4ecigs refill cartridges are available in the new Black/Silver Tips, compatible with Best4ecigs NEW Classic 320 Battery and both the Magnum and Power+ range of e-cigarettes (510 thread). We also have a range of Brown Tip Cartridges available (whilst stocks last), which are compatible only with Best4ecigs Classic 280 range (808 thread). The cartridges come in a wide variety of flavours including Tobacco, Cherry, Mango, Blueberry and many more! E-cig refill cartridges come in five different nicotine strengths too. MULTIBUY savings available!