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A deer feeder timer that calls for 6V normally uses a sealed lead-acid (SLA/AGM) battery with quick-disconnect tabs, not a lantern battery. Voltage, case dimensions, tab style and polarity are the fitment checks; amp-hours only tell you potential reserve once the battery physically fits. The first item is explicitly sold for deer feeders. The remaining verified SLA batteries are labelled form-factor alternatives, so measure the battery compartment and compare the timer harness before treating them as replacements. Use a regulated 6V SLA charger, not a 12V charger and not a lithium-only charger.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Mighty Max ML4-6 Deer Feeder Battery | $13-$16 | Amazon · eBay |
| 2 | Power-Sonic PS-621 | $10-$25 | Amazon |
| 3 | Power-Sonic PS-628 | $12-$28 | Amazon |
| 4 | Power-Sonic PS-630ST | $14-$30 | Amazon · eBay |
| 5 | Power-Sonic PS-640 | $14-$25 | Amazon · eBay |
| 6 | Power-Sonic PS-650LF | $16-$35 | Amazon · eBay |
| 7 | Power-Sonic PS-665 | $10-$22 | Amazon |
| 8 | Power-Sonic PS-670 | $16-$24 | Amazon · eBay |
| 9 | Power-Sonic PS-682 | $14-$30 | Amazon |
| 10 | Power-Sonic PS-6100 | $25-$45 | Amazon · eBay |
The picks, in detail
Mighty Max ML4-6 Deer Feeder Battery
A 6V 4.5Ah sealed AGM battery expressly sold for deer and game feeders. It measures 2.76 x 1.89 x 4.21 inches and uses F1 tabs, making it the straightforward choice for a feeder tray designed around the common small 6V SLA case.
- 6V 4.5Ah AGM/SLA
- 2.76 x 1.89 x 4.21 inches
- F1 quick-connect terminals
- Explicit deer-feeder application
- Maintenance-free sealed construction
- Battery only; no harness included
- 4.5Ah reserve is modest for a high-duty-cycle feeder
Power-Sonic PS-621
A compact 6V 2Ah AGM SLA option with F1 tabs and a 1.69 x 1.46 x 2.99-inch case. It is only useful where the timer’s tray is unusually small and the feeder’s duty cycle is light; it is not a capacity upgrade over a 4.5Ah feeder battery.
- 6V 2Ah AGM SLA
- 1.69 x 1.46 x 2.99 inches
- F1 tabs
- Very small case footprint
- Same 6V SLA charging family
- Shorter reserve than common feeder batteries
- Must have enough room for its upright case
Power-Sonic PS-628
A 6V 2.9Ah AGM SLA battery with F1 terminals and a 2.60 x 1.30 x 3.86-inch case. Its narrow profile can suit a restrictive feeder compartment, provided the harness reaches the tab orientation.
- 6V 2.9Ah AGM SLA
- 2.60 x 1.30 x 3.86 inches
- F1 quick-disconnect tabs
- Narrow case is distinct from standard 4.5Ah blocks
- Compatible with regulated 6V SLA charging
- Not marketed as a feeder-specific battery
- Less reserve than 4.5Ah and larger options
Power-Sonic PS-630ST
A flat 6V 3.5Ah AGM SLA battery measuring 5.28 x 1.34 x 2.35 inches with F1 tabs. Its low, long shape is a genuine different case format, so it is a measured-fit alternative rather than a universal replacement.
- 6V 3.5Ah AGM SLA
- 5.28 x 1.34 x 2.35 inches
- F1 tabs; low-profile case
- Low-height case can solve a clearance problem
- Sealed lead-acid chemistry
- Long footprint will not fit every timer box
- Capacity remains below a 4.5Ah feeder battery
Power-Sonic PS-640
A 6V 4.5Ah general-purpose AGM SLA battery with F1 tabs and a 2.76 x 1.85 x 3.94-inch body (4.17 inches over terminals). It is a documented specification match for feeders that accept the standard small 4.5Ah block, but it is not sold with a feeder harness.
- 6V 4.5Ah AGM SLA
- 2.76 x 1.85 x 3.94 inches
- F1 0.187-inch tabs
- Published technical sheet gives exact terminal and dimensions
- Power-Sonic recommends its 6V SLA charger family
- Check height over terminals, not only case height
- No feeder-specific connector included
Power-Sonic PS-650LF
A 6V 5Ah AGM SLA option in a nearly square 2.64 x 2.64 x 3.94-inch case. It uses F1 or spade-terminal configurations, so confirm both the actual terminal version and clearance before replacing a feeder battery.
- 6V 5Ah AGM SLA
- 2.64 x 2.64 x 3.94 inches
- F1 or spade terminal configurations
- Slight capacity step above 4.5Ah
- Different square footprint can suit a matching tray
- Terminal configuration must be ordered correctly
- Wider case than the common narrow 4.5Ah block
Power-Sonic PS-665
A 6V 6.5Ah sealed lead-acid battery in a 3.86 x 2.20 x 3.78-inch case with a polarized Faston terminal. It provides more reserve only if the feeder compartment and its connector can accept this wider, differently terminated battery.
- 6V 6.5Ah SLA
- 3.86 x 2.20 x 3.78 inches
- Faston polarized terminal
- More reserve than 4.5Ah units
- Exact case and terminal data are published
- Polarized terminal may not mate with a standard feeder harness
- Requires a larger tray
Power-Sonic PS-670
A slim 6V 7Ah AGM SLA battery with F1 tabs, measuring 5.95 x 1.34 x 3.70 inches. It is a useful capacity step only for feeders with a long, narrow compartment and a 6V SLA-compatible timer harness.
- 6V 7Ah AGM SLA
- 5.95 x 1.34 x 3.70 inches
- F1 0.187-inch tabs
- 7Ah reserve in a narrow case
- Current retailer listings show this exact model and dimensions
- Long case does not fit common compact trays
- No built-in deer-feeder plug
Power-Sonic PS-682
An 8.5Ah 6V AGM SLA option with F1 terminals and a 3.86 x 2.20 x 4.65-inch body. It offers a larger reserve in a taller case, so terminal height and lid clearance matter as much as the base dimensions.
- 6V 8.5Ah AGM SLA
- 3.86 x 2.20 x 4.65 inches
- F1 tabs; 4.72 inches over terminal
- Meaningful reserve increase over standard 4.5Ah batteries
- Published dimensions and terminal type
- Tall, heavier case
- Requires a larger feeder battery bay
Power-Sonic PS-6100
A 6V 12Ah AGM SLA battery with a 5.95 x 2.00 x 3.70-inch case and F1/F2 terminal options. This is the large-reserve choice only when the feeder cabinet can support its size and weight and the harness matches the selected tab width.
- 6V 12Ah AGM SLA
- 5.95 x 2.00 x 3.70 inches
- F1 or F2 terminal options
- Largest reserve in this measured-fit list
- Same 6V SLA charger chemistry
- May be physically too large for timer-mounted trays
- Terminal width must match the feeder harness
Buying tips
- Match 6V to a charger designed for 6V SLA/AGM batteries. A 12V automotive charger can damage a 6V block; lithium charger settings are not interchangeable with SLA charging.
- Measure length, width, height over the tabs and the positive/negative tab orientation before buying. F1 tabs are 0.187 inch wide; F2 tabs are wider, and a polarized Faston is not the same connector.
- More amp-hours can extend run time, but it does not make a battery compatible. Feeder motor load, feeding schedule, temperature and battery age all affect service interval.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.