This is BS Battery's small sealed AGM battery for the Honda Grom and the other 125s built around the same case. BS sells it under two names, BTX4L+ and BTZ5S, because it replaces both of those older battery types. BS rates it at 12 volts, 4 amp-hours at the ten-hour rate, 4.2 amp-hours at the twenty-hour rate and 65 cold cranking amps, in a case measuring 113 x 70 x 85 mm (4.45" x 2.76" x 3.35"), at 1.52 kg (3.35 lb).
It is factory activated. The acid is already in it, it has been charged, and the case is sealed at the factory, so there is no acid pack to pour and no activation step at your end. BS's own words for it are plug and play.
Sealed AGM means maintenance-free in the literal sense. BS describes the design as VRLA — valve regulated lead acid — with the electrolyte held in a glass fibre mat, so there are no cells to open and no water to add for the life of the battery.
A battery is matched to a bike by case size, terminal layout and polarity rather than by model name. On this battery Parts Unlimited puts the positive terminal at the right front and the negative at the left front. The Grom years on the list are the ones Parts Unlimited catalogues for this exact part; if your Grom is a 2021 or later, compare it with the battery coming out of your bike before ordering.
Key Technology & Design
Factory activated
Filled, charged and sealed at the factory. It arrives ready to install, with no acid to handle.
Absorbed glass mat construction
The electrolyte is held in a glass fibre mat rather than sitting loose in the case.
Spill-proof and multi-position
BS states the case is factory sealed and spill-proof, and that the battery can be mounted at angles up to 90 degrees.
Maintenance free
A VRLA design with nothing to top up over the life of the battery.
Low self-discharge
BS states a low discharge rate and extended cycle life.
This is BS Battery’s small sealed AGM battery for the Honda Grom and the other 125s built around the same case. BS sells it under two names, BTX4L+ and BTZ5S, because it replaces both of those older battery types. BS rates it at 12 volts, 4 amp-hours at the ten-hour rate, 4.2 amp-hours at the twenty-hour rate and 65 cold cranking amps, in a case measuring 113 x 70 x 85 mm (4.45″ x 2.76″ x 3.35″), at 1.52 kg (3.35 lb).
It is factory activated. The acid is already in it, it has been charged, and the case is sealed at the factory, so there is no acid pack to pour and no activation step at your end. BS’s own words for it are plug and play.
Sealed AGM means maintenance-free in the literal sense. BS describes the design as VRLA — valve regulated lead acid — with the electrolyte held in a glass fibre mat, so there are no cells to open and no water to add for the life of the battery.
A battery is matched to a bike by case size, terminal layout and polarity rather than by model name. On this battery Parts Unlimited puts the positive terminal at the right front and the negative at the left front. The Grom years on the list are the ones Parts Unlimited catalogues for this exact part; if your Grom is a 2021 or later, compare it with the battery coming out of your bike before ordering.
Key Technology & Design
Factory activated
Filled, charged and sealed at the factory. It arrives ready to install, with no acid to handle.
Absorbed glass mat construction
The electrolyte is held in a glass fibre mat rather than sitting loose in the case.
Spill-proof and multi-position
BS states the case is factory sealed and spill-proof, and that the battery can be mounted at angles up to 90 degrees.
Maintenance free
A VRLA design with nothing to top up over the life of the battery.
Low self-discharge
BS states a low discharge rate and extended cycle life.
