Philips V24CT - Manual (Page 362)

External Battery Charger
12-8 Battery Information (V24CT and V26CT only)
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External Battery Charger
We suggest that you use the Philips M1278A external battery charger to
charge the M1205A batteries. This battery charger can charge up to 4
sealed lead-acid batteries at one time in two-and-a-half hours. LED
indicators will indicate the status of each battery during a charging
cycle.
Note— Use of other battery chargers may result in shorter battery life
and is not recommended.
Refer to the external battery charger operating guide for specific
operating instructions.