Smart vs Trickle Battery Charger: Which One Should You Buy?

The short answer on smart vs trickle battery charger choice: pick the smart side for selectable charge rates and multi-stage charging, as the Clore PL2320 example shows with 2, 10 and 20 amp rates for 6V and 12V batteries; pick the trickle side for long-term maintenance of a stored 12V battery, as the Battery Tender Junior example shows with a 750mA charge and an automatic float mode. We compared the three listings on what each states: charge rates, battery fit, safety listings and warranty terms. The Spektrum example is a smart charger for RC battery packs, not for stored vehicle batteries, so it sits outside the verdict.

SolarKitHQ earns a commission when you buy through links on this page, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.

Smart vs trickle: side by side

Specifications are manufacturer rated as listed, collected 21 October 2026.

Charge rates and battery fit

The Clore example states selectable 2, 10 and 20 amp rates for 6V and 12V batteries. The Battery Tender Junior example states a fixed 750mA for 12V batteries only, with stated compatibility for lead-acid, flooded, AGM and gel types. The Spektrum example states 100W per channel for RC smart battery packs and names no 12V lead-acid support. Rate and battery fit is the first split between the sides, and if the tow vehicle is your charging source, see the best DC to DC charger for trailer.

What each side automates

Both sides automate the finish. The Clore smart example lists a multi-phase charging process with temperature compensation, plus a power supply mode that holds stable system voltage. The Battery Tender example runs a 4-step program (initialization, bulk charge, absorption, float) and switches to float mode for long-term storage, with spark-proof circuitry and reverse hook-up detection stated. The Spektrum example automates differently: it reads the smart battery’s parameters and starts charging on connection.

What the listings leave unclear

The Clore spec table lists 4-amp charge rates against the title’s 20 amps and the bullets’ 2/10/20 amps, so trust the title and bullets. The Battery Tender bullets state 3.3 by 1.3 by 2.4 inches while the spec table states 2.9 by 2.15 by 4.4 inches. The Spektrum spec table lists a 5V output against a 2x100W title, and none of the listings state a charge current in amps for the Spektrum. Compare only the figures the listings state clearly on both sides.

Three examples

#	Product	Solar Score	Buy
1	Battery Tender Junior 750mA	9.7/10	Buy on Amazon
2	Clore PL2320 20A Smart Charger	9.6/10	Buy on Amazon
3	Spektrum S2100 G2 Smart Charger	9.4/10	Buy on Amazon

1

Battery Tender Junior 750mA

Battery Tender·9.7/10 Solar Score

i

The Solar Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 12V 750mA charger and maintainer with a 4-step program, float mode and a stated 5-year warranty.

Check price on Amazon

Pros

• 4-step charging program ending in float mode for storage
• Compatible with 12V lead-acid, flooded, AGM and gel batteries stated
• Spark-proof circuitry with reverse hook-up detection stated
• 5-year warranty stated

Cons

• 750mA charge rate suits maintenance, not fast charging
• Bullets state 3.3 x 1.3 x 2.4 inches while the spec table states 2.9 x 2.15 x 4.4
• 1 pound stated for the charger only, cables add more
• Single port, one battery at a time

Detailed Review

The listing states a 12V 750mA charger and maintainer with a 4-step charging program (initialization, bulk charge, absorption, float), compatibility with 12V lead-acid, flooded, AGM and gel cell batteries, a 12-foot output cord, a fused ring terminal harness and alligator clip cables, spark-proof circuitry, reverse hook-up detection, a two-color charge status LED and a 5-year warranty with lifetime customer support. The bullets state 3.3 by 1.3 by 2.4 inches while the spec table states 2.9 by 2.15 by 4.4 inches, so trust the bullets for the size.

Who it's for: owners keeping a motorcycle, ATV or stored vehicle battery at full charge for months. Who should skip it: anyone who needs to recharge a large drained battery quickly, since 750mA is a maintenance rate.

Its Solar Score of 9.7/10 comes from performance 28/35, build 21/25, value 21/25, safety 8/10 and warranty 3/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.

Key Specifications

Output	12V, 750mA
Program	4-step: init, bulk, absorb, float
Cord	12-ft output cord
Size	3.3 x 1.3 x 2.4 in

Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.

Safety and Warranty

What this listing states. CSA, ETL and FCC listings stated; spark-proof circuitry and reverse hook-up detection stated, so safety scores 8 of 10. 5-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.

Match the charger. Use a charger mode that matches your battery's stated chemistry and voltage, connect in the order the manual gives, and keep it ventilated and dry.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

2

Clore PL2320 20A Smart Charger

Clore Automotive·9.6/10 Solar Score

i

The Solar Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 20-amp smart charger for 6V and 12V batteries with selectable rates, temperature compensation and a power supply mode.

Check price on Amazon

Pros

• Selectable 2, 10 and 20 amp charge rates
• Charges both 6V and 12V batteries
• Multi-phase charging with temperature compensation stated
• Power supply mode for stable system voltage stated

Cons

• Spec table lists 4-amp charge rates against the title's 20 amps
• Only 1 year warranty stated
• UL is the only certification stated
• No output cord length is stated

Detailed Review

The listing states a 20-amp fully-automatic smart charger for 6V and 12V batteries with 2, 10 and 20 amp charge rates, a multi-phase charging process, temperature compensation, a power supply mode, an LED display, battery clamps, ring terminals and a 12V adapter, a UL listing and a 1 year warranty. The spec table lists charge rates of 4 amps against the title's 20 amps and the bullets' 2/10/20 amps, so trust the title and bullets.

Who it's for: owners who charge different battery sizes and want selectable rates plus a power supply mode. Who should skip it: anyone who wants the longest warranty here, since the listing states only 1 year.

Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 20/25, safety 7/10 and warranty 1/5: 78 of 100 points, placed on our 9.2 to 9.8 scale.

Key Specifications

Rates	2/10/20A, 6V and 12V
Charging	multi-phase, temp compensation
Modes	charger, maintainer, power supply
Weight	1.3 lb

Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.

Safety and Warranty

What this listing states. UL listing stated; temperature compensation and automatic multi-phase charging stated, so safety scores 7 of 10. 1 year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 1 of 5. See How We Pick.

Match the charger. Use a charger mode that matches your battery's stated chemistry and voltage, connect in the order the manual gives, and keep it ventilated and dry.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

3

Spektrum S2100 G2 Smart Charger

Spektrum·9.4/10 Solar Score

i

The Solar Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 2x100W AC smart charger for RC battery packs with automatic parameter recognition and IC3/IC5 ports.

Check price on Amazon

Pros

• 100W per channel, 200W on one channel, stated
• Auto charge recognizes smart battery parameters
• IC3 and IC5 ports with no adapter needed stated
• RoHS, UL, CE and FCC listings stated

Cons

• Targets RC battery packs, not 12V vehicle batteries
• No warranty term is stated
• Spec table lists 5V output against a 2x100W title
• 240V input stated in the spec table

Detailed Review

The listing states a 2x100W AC smart charger with 200W available on one channel, IC3 and IC5 charging output ports, automatic recognition of Spektrum smart battery parameters, compatibility with RC, EC3 and EC5 batteries, a 2.9-pound weight and RoHS, UL, CE and FCC listings. The listing targets RC battery packs rather than 12V lead-acid vehicle batteries, and states no warranty term.

Who it's for: RC hobbyists charging Spektrum smart packs on two channels. Who should skip it: anyone maintaining a stored vehicle or powersports battery.

Its Solar Score of 9.4/10 comes from performance 21/35, build 20/25, value 18/25, safety 9/10 and warranty 0/5: 68 of 100 points, placed on our 9.2 to 9.8 scale.

Key Specifications

Power	2x100W, 200W on one channel
Ports	IC3, IC5
Batteries	RC smart, EC3/EC5
Weight	2.9 lb

Figures as published on the retailer listing, collected 21 October 2026. Performance figures are manufacturer rated.

Safety and Warranty

What this listing states. RoHS, UL, CE and FCC listings stated, so safety scores 9 of 10. No warranty term, so warranty scores zero. See How We Pick.

Match the charger. Use a charger mode that matches your battery's stated chemistry and voltage, connect in the order the manual gives, and keep it ventilated and dry.

This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

As an Amazon Associate I earn from qualifying purchases.

How we scored them

The Solar Score weighs performance, build, value, safety and warranty. For battery chargers, safety means stated certifications and protection features like spark-proof circuitry and reverse hook-up detection. All three examples state certifications, and two of the three state a warranty term. How we pick explains the weights.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

Smart vs trickle battery charger: which should you choose?

Choose the smart side if you want selectable charge rates and multi-stage charging for different battery sizes: the Clore example offers 2, 10 and 20 amps with 6V and 12V support, temperature compensation and a power supply mode. Choose the trickle side for a stored powersports or vehicle battery: the Battery Tender Junior example charges at 750mA and switches to float mode for long-term maintenance, with a stated 5-year warranty. Skip the Spektrum example for stored vehicle batteries: its listing targets RC smart battery packs. For the battery side of the decision, see lithium vs lead acid battery for RV.

Sizing Notes

• Match the charger’s stated battery volts to your battery: 6V and 12V on the Clore example, 12V on the Battery Tender Junior, RC packs on the Spektrum.
• Match the charge rate to the job: 750mA for maintenance charging, 2/10/20A when you need a battery back in service sooner.
• Check the chemistry line: the Battery Tender Junior lists lead-acid, flooded, AGM and gel cell batteries.
• Check the stated certifications: UL on Clore, CSA/ETL/FCC on Battery Tender, RoHS/UL/CE/FCC on Spektrum.
• Fuse the battery lead as the manual directs, and leave any work on the vehicle’s 120V wiring to a qualified technician.

Frequently Asked Questions

What separates a smart charger from a trickle charger here?

The Clore smart example states selectable 2, 10 and 20 amp rates, a multi-phase process and temperature compensation. The Battery Tender maintainer example charges at a fixed 750mA and switches to float mode for storage. Both automate the finish; the smart side offers selectable rates.

Can the Battery Tender Junior charge an AGM battery?

The listing states compatibility with 12V lead-acid, flooded, AGM and gel cell batteries.

Does the Clore PL2320 charge 24V batteries?

The spec table lists no data for 24V charging. The title and bullets state 6V and 12V only.

Which charger here states the longest warranty?

The Battery Tender Junior, at 5 years stated. The Clore example states 1 year, and the Spektrum listing states no term.

Still deciding? Our top pickBattery Tender Junior 750mA

Check price on Amazon

Related guides

See every Battery Chargers and Maintainers guide and all Batteries and Charging guides. Also see our best battery charger and maintainer. Also see our MPPT vs PWM charge controller. Also see our LiFePO4 vs AGM battery for solar.