Top Safety: Certified and listed by UL - the national gold standard of electronic safety in the US, as this replacement charger fit for Lenovo laptop meets the highest safety and quality level in the industry - a hard-to-earned level only very few in the market have reached. Superb Compatibility: Fit for Lenovo 230w laptops with Slim tip power connector, model e.g. Thinkpad T15g P15 P16 P16v P17 Gen 1 2, P70 P71 P72 P73 P53 P52 P51 P50 W541 W540 T540p, X1 Extreme Gen 3 4 5, P1 Gen 3 4 5 6 7 and more.