Battery Bosch or Duracell

I have a Cube Stereo Hybrid pro (insert numbers here)

Priced about 3.5k retail, it's an absolute dream to ride. Quiet, huge battery (bosch power tube 800)

Why on earth would you pay $600 for battery + terminal. I bought recently a BOSCH AGM for $235 and installed it for free by myself after watching a tutorial on youtube.

if you have a costco membership they sell the bosch batteries for a bit more but theyre amazing. 4 year warranty too

I noticed that between 4ah and 5ah battery is little difference, but not much, 15% i would say. BUT 5.5 procore seems like 50% better than 4AH bosch battery and at least 15-20% stronger than bosch 5AH battery. When i say stronger, it is noticable in speed,strenght when i cut pellets, or drill concrete, or doing some 100mm or larger screws.

The replacement battery I bought was a Duracell from Sam’s Club. Fit and worked fine.

Not near Utah but here on the west coast I use Powersonic or Genesis or Yuasa with good luck. For some reason all the Duracells I have purchased over the years fail about a year out of install.

The mechanic I go to gives me Bosch and they last around 2 years if not more. But then they do die within a day when they do.

After 7 sets of battery drains, I installed a new set and left it on a shelf untouched for a week. Turned on and dead. Made a warranty claim with Bosch to which their lazy troubleshooting reply:  

Let me start by apologizing on behalf of BOSCH for any inconvenience this has caused you. I performed a complete inspection: I 1st charged up your lithium battery. I then calibrated & tested unit with both alkaline & lithium batteries: PASSED.   I know it’s an inconvience. But:  Leaving any batteries in unit when not in use: ( Unit will drain all battery types )—( Unit self discharges batteries when not in use ) --That is why Bosch put in manual tom remove batteries. PG# 21—Attached – ( they actually don’t say how long the “ extended period is “) That way it is not considerd a factory defect. Other than that: unit is operating to all Manufacurers Specification & Tolerances.   Best regards, 

-Well I'm never buying another Bosch product again with customer service like that. Pissed that I bought this expensive paperweight. What product in today's world drains batteries when not in use?  Clearly flawed engineering they are hiding and do not value the end users. A recall is in order.

I switched to Bosch after that. that failed after 2.5 years, just under warranty. so it can happen with any company. some batches might have good quality some do not.

Power Sonic or Yuasa. Duracell is great for lots of service every year after an inspection. Never seen them make it to the next inspection alive.