This flashlights use rechargeable LiIon battery that have only 500-1000 cycles. Battery fail earlier than plastic case. Also, if battery is drained, you have to fap for a long time in the dark to recharge battery. Very bad design and idea. If you want real thing - search for dynamo flashlights in metal case that have a handle that drive generator. There is no battery inside so, it will work instantly when needed until gears and generator wears out. Best solution is to find a vintage dynamo flashlight, with metal gears and replace incandenced bulb with LED and driver. Will work forever.
USB cables problem is in stupid connectors, not in the cable itself. There is no any problem to make yourself an USB cable using wires as strong and flexible as you want, but connectors will always be a point of failure.
Most mufflers that sold by different tuning businesses, as shown, usualy made from inferior cheap martensite stainless steel like AISI 431 and alike. They will not last long, especially in citites where salt used to melt ice on roads. Good and long-lasting muffler should be made from austenite stainless steel, at least AISI 304, better AISI 316 or AISI 321. You could easily find out is it a cheap martensite or good austenite - magent does not stick to austenite stainless steel at all. If it does, even slightly - avoid it, regardless of anything seller will tell you. Welds should not be magnetic too and should have the same color as steel. Different color is an indication that there was too little argon, so weld have a good chance to be fucked. Grinded or polished welds is a bad sign too, probably they just saved money on argon, and then just grind off color. Titanium mufflers are also fine, they are very light, so much less load on rubber mounts.
This flashlights use rechargeable LiIon battery that have only 500-1000 cycles. Battery fail earlier than plastic case. Also, if battery is drained, you have to fap for a long time in the dark to recharge battery. Very bad design and idea. If you want real thing - search for dynamo flashlights in metal case that have a handle that drive generator. There is no battery inside so, it will work instantly when needed until gears and generator wears out. Best solution is to find a vintage dynamo flashlight, with metal gears and replace incandenced bulb with LED and driver. Will work forever.
USB cables problem is in stupid connectors, not in the cable itself. There is no any problem to make yourself an USB cable using wires as strong and flexible as you want, but connectors will always be a point of failure.
Most mufflers that sold by different tuning businesses, as shown, usualy made from inferior cheap martensite stainless steel like AISI 431 and alike. They will not last long, especially in citites where salt used to melt ice on roads. Good and long-lasting muffler should be made from austenite stainless steel, at least AISI 304, better AISI 316 or AISI 321. You could easily find out is it a cheap martensite or good austenite - magent does not stick to austenite stainless steel at all. If it does, even slightly - avoid it, regardless of anything seller will tell you. Welds should not be magnetic too and should have the same color as steel. Different color is an indication that there was too little argon, so weld have a good chance to be fucked. Grinded or polished welds is a bad sign too, probably they just saved money on argon, and then just grind off color. Titanium mufflers are also fine, they are very light, so much less load on rubber mounts.