What is the difference between 6qf70 and 6qw70?

2 Answers
LeLane
07/29/25 4:21am
6qf70 and 6qw70 differ in that one is a maintenance-free battery and the other is an acid-proof battery. Here is a detailed interpretation: 1. 6: Indicates the number of battery cells connected in series, which means 6 series-connected cells, each with 2 volts, indicating a rated voltage of 12 volts. 2. Q: Indicates that it is a starting battery, as the name suggests, different from the endurance battery used in electric vehicles, and cannot be mixed. 3. W: W is the characteristic code of the battery, indicating a maintenance-free battery. 4. F: f indicates acid-proof. 5. 70: Indicates the capacity of the battery. 6. 6-QW-70: It is a 12-volt maintenance-free starting battery with a rated capacity of 70 ampere-hours. 7. 6-QF-70: It is a 12-volt acid-proof battery with a rated capacity of 70 ampere-hours.
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LaBrandon
08/12/25 8:05am
I've been repairing cars for over a decade and have replaced batteries for many car owners. Both the 6QF70 and 6QW70 belong to the Bosch series with 60Ah capacity but differ in technology. The 6QF70 is a traditional lead-acid battery requiring regular liquid level checks and water maintenance, featuring a starting current (CCA) of about 520 amps, suitable for general climates. The 6QW70 is an AGM-type battery, maintenance-free with no need for water replenishment, boasting a CCA of over 600 amps for more reliable cold starts. AGM batteries offer better vibration resistance and deep-cycle capability, especially suited for vehicles with start-stop systems. Price-wise, the QW is about 100-200 yuan more expensive but lasts two years longer. I recommend AGM for owners frequently driving in congested routes to avoid frequent maintenance hassles and reduce failure rates. Neglecting maintenance on QF may lead to early failure and towing costs, making QW the more cost-effective choice overall.
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